diff --git a/app/modules/adxl345.c b/app/modules/adxl345.c
index f248bf77..b7c9d3eb 100644
--- a/app/modules/adxl345.c
+++ b/app/modules/adxl345.c
@@ -12,7 +12,7 @@
 static const uint32_t adxl345_i2c_id = 0;
 static const uint8_t adxl345_i2c_addr = 0x53;
 
-static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
+static uint8_t r8u(uint32_t id, uint8_t reg) {
     uint8_t ret;
 
     platform_i2c_send_start(id);
@@ -26,19 +26,9 @@ static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
     return ret;
 }
 
-static int ICACHE_FLASH_ATTR adxl345_init(lua_State* L) {
-
-    uint32_t sda;
-    uint32_t scl;
+static int adxl345_setup(lua_State* L) {
     uint8_t  devid;
 
-    sda = luaL_checkinteger(L, 1);
-    scl = luaL_checkinteger(L, 2);
-
-    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
-
-    platform_i2c_setup(adxl345_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
-    
     devid = r8u(adxl345_i2c_id, 0x00);
 
     if (devid != 229) {
@@ -55,7 +45,24 @@ static int ICACHE_FLASH_ATTR adxl345_init(lua_State* L) {
     return 0;
 }
 
-static int ICACHE_FLASH_ATTR adxl345_read(lua_State* L) {
+static int adxl345_init(lua_State* L) {
+
+    uint32_t sda;
+    uint32_t scl;
+
+    platform_print_deprecation_note("adxl345.init() is replaced by adxl345.setup()", "in the next version");
+
+    sda = luaL_checkinteger(L, 1);
+    scl = luaL_checkinteger(L, 2);
+
+    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
+
+    platform_i2c_setup(adxl345_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+    
+    return adxl345_setup(L);
+}
+
+static int adxl345_read(lua_State* L) {
 
     uint8_t data[6];
     int x,y,z;
@@ -88,6 +95,8 @@ static int ICACHE_FLASH_ATTR adxl345_read(lua_State* L) {
 
 static const LUA_REG_TYPE adxl345_map[] = {
     { LSTRKEY( "read" ),         LFUNCVAL( adxl345_read )},
+    { LSTRKEY( "setup" ),        LFUNCVAL( adxl345_setup )},
+    /// init() is deprecated
     { LSTRKEY( "init" ),         LFUNCVAL( adxl345_init )},
     { LNILKEY, LNILVAL}
 };
diff --git a/app/modules/am2320.c b/app/modules/am2320.c
index a0d94608..a3e6736b 100644
--- a/app/modules/am2320.c
+++ b/app/modules/am2320.c
@@ -84,10 +84,8 @@ static int _read(uint32_t id, void *buf, uint8_t len, uint8_t off)
     return 0;
 }
 
-static int am2320_init(lua_State* L)
+static int am2320_setup(lua_State* L)
 {
-    uint32_t sda;
-    uint32_t scl;
     int ret;
     struct {
     	uint8_t  cmd;
@@ -97,6 +95,24 @@ static int am2320_init(lua_State* L)
 	uint32_t id;
     } nfo;
 
+    os_delay_us(1500); // give some time to settle things down
+    ret = _read(am2320_i2c_id, &nfo, sizeof(nfo)-2, 0x08);
+    if(ret)
+        return luaL_error(L, "transmission error");
+
+    lua_pushinteger(L, ntohs(nfo.model));
+    lua_pushinteger(L, nfo.version);
+    lua_pushinteger(L, ntohl(nfo.id));
+    return 3;
+}
+
+static int am2320_init(lua_State* L)
+{
+    uint32_t sda;
+    uint32_t scl;
+
+    platform_print_deprecation_note("am2320.init() is replaced by am2320.setup()", "in the next version");
+
     if (!lua_isnumber(L, 1) || !lua_isnumber(L, 2)) {
         return luaL_error(L, "wrong arg range");
     }
@@ -110,15 +126,7 @@ static int am2320_init(lua_State* L)
 
     platform_i2c_setup(am2320_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
 
-    os_delay_us(1500); // give some time to settle things down
-    ret = _read(am2320_i2c_id, &nfo, sizeof(nfo)-2, 0x08);
-    if(ret)
-        return luaL_error(L, "transmission error");
-
-    lua_pushinteger(L, ntohs(nfo.model));
-    lua_pushinteger(L, nfo.version);
-    lua_pushinteger(L, ntohl(nfo.id));
-    return 3;
+    return am2320_setup(L);
 }
 
 static int am2320_read(lua_State* L)
@@ -145,8 +153,10 @@ static int am2320_read(lua_State* L)
 }
 
 static const LUA_REG_TYPE am2320_map[] = {
-    { LSTRKEY( "read" ), LFUNCVAL( am2320_read )},
-    { LSTRKEY( "init" ), LFUNCVAL( am2320_init )},
+    { LSTRKEY( "read" ),  LFUNCVAL( am2320_read )},
+    { LSTRKEY( "setup" ), LFUNCVAL( am2320_setup )},
+    // init() is deprecated
+    { LSTRKEY( "init" ),  LFUNCVAL( am2320_init )},
     { LNILKEY, LNILVAL}
 };
 
diff --git a/app/modules/bme280.c b/app/modules/bme280.c
index 24503386..a1ef58da 100644
--- a/app/modules/bme280.c
+++ b/app/modules/bme280.c
@@ -227,35 +227,25 @@ static double bme280_qfe2qnh(int32_t qfe, int32_t h) {
 	return qnh;
 }
 
-static int bme280_lua_init(lua_State* L) {
-	uint8_t sda;
-	uint8_t scl;
+static int bme280_lua_setup(lua_State* L) {
 	uint8_t config;
 	uint8_t ack;
 	uint8_t full_init;
-	
+
 	uint8_t const bit3 = 0b111;
 	uint8_t const bit2 = 0b11;
 
-	if (!lua_isnumber(L, 1) || !lua_isnumber(L, 2)) {
-		return luaL_error(L, "wrong arg range");
-	}
-	sda = luaL_checkinteger(L, 1);
-	scl = luaL_checkinteger(L, 2);
-	
-	bme280_mode = (!lua_isnumber(L, 6)?BME280_NORMAL_MODE:(luaL_checkinteger(L, 6)&bit2)) // 6-th parameter: power mode
-		| ((!lua_isnumber(L, 4)?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 4)&bit3)) << 2) // 4-th parameter: pressure oversampling
-		| ((!lua_isnumber(L, 3)?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 3)&bit3)) << 5); // 3-rd parameter: temperature oversampling
+	bme280_mode = (!lua_isnumber(L, 4)?BME280_NORMAL_MODE:(luaL_checkinteger(L, 4)&bit2)) // 4-th parameter: power mode
+		| ((!lua_isnumber(L, 2)?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 2)&bit3)) << 2) // 2-nd parameter: pressure oversampling
+		| ((!lua_isnumber(L, 1)?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 1)&bit3)) << 5); // 1-st parameter: temperature oversampling
 		
-	bme280_ossh = (!lua_isnumber(L, 5))?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 5)&bit3); // 5-th parameter: humidity oversampling
+	bme280_ossh = (!lua_isnumber(L, 3))?BME280_OVERSAMP_16X:(luaL_checkinteger(L, 3)&bit3); // 3-rd parameter: humidity oversampling
 	
-	config = ((!lua_isnumber(L, 7)?BME280_STANDBY_TIME_20_MS:(luaL_checkinteger(L, 7)&bit3))<< 5) // 7-th parameter: inactive duration in normal mode
-		| ((!lua_isnumber(L, 8)?BME280_FILTER_COEFF_16:(luaL_checkinteger(L, 8)&bit3)) << 2); // 8-th parameter: IIR filter
-	full_init = !lua_isnumber(L, 9)?1:lua_tointeger(L, 9); // 9-th parameter: init the chip too
+	config = ((!lua_isnumber(L, 5)?BME280_STANDBY_TIME_20_MS:(luaL_checkinteger(L, 5)&bit3))<< 5) // 5-th parameter: inactive duration in normal mode
+		| ((!lua_isnumber(L, 6)?BME280_FILTER_COEFF_16:(luaL_checkinteger(L, 6)&bit3)) << 2); // 6-th parameter: IIR filter
+	full_init = !lua_isnumber(L, 7)?1:lua_tointeger(L, 7); // 7-th parameter: init the chip too
 	NODE_DBG("mode: %x\nhumidity oss: %x\nconfig: %x\n", bme280_mode, bme280_ossh, config);
 	
-	platform_i2c_setup(bme280_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
-
 	bme280_i2c_addr = BME280_I2C_ADDRESS1;
 	platform_i2c_send_start(bme280_i2c_id);
 	ack = platform_i2c_send_address(bme280_i2c_id, bme280_i2c_addr, PLATFORM_I2C_DIRECTION_TRANSMITTER);
@@ -324,6 +314,30 @@ static int bme280_lua_init(lua_State* L) {
 	return 1;
 }
 
+static int bme280_lua_init(lua_State* L) {
+	uint8_t sda;
+	uint8_t scl;
+	uint8_t config;
+	uint8_t ack;
+	uint8_t full_init;
+	
+	platform_print_deprecation_note("bme280.init() is replaced by bme280.setup()", "in the next version");
+
+	if (!lua_isnumber(L, 1) || !lua_isnumber(L, 2)) {
+		return luaL_error(L, "wrong arg range");
+	}
+	sda = luaL_checkinteger(L, 1);
+	scl = luaL_checkinteger(L, 2);
+	
+	platform_i2c_setup(bme280_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+
+	// remove sda and scl parameters from stack
+	lua_remove(L, 1);
+	lua_remove(L, 1);
+
+	return bme280_lua_setup(L);
+}
+
 static void bme280_readoutdone (void *arg)
 {
 	NODE_DBG("timer out\n");
@@ -481,7 +495,9 @@ static int bme280_lua_dewpoint(lua_State* L) {
 }
 
 static const LUA_REG_TYPE bme280_map[] = {
+        // init() is deprecated
 	{ LSTRKEY( "init" ), LFUNCVAL(bme280_lua_init)},
+	{ LSTRKEY( "setup" ), LFUNCVAL(bme280_lua_setup)},
 	{ LSTRKEY( "temp" ),  LFUNCVAL(bme280_lua_temp)},
 	{ LSTRKEY( "baro" ),  LFUNCVAL(bme280_lua_baro)},
 	{ LSTRKEY( "humi" ),  LFUNCVAL(bme280_lua_humi)},
diff --git a/app/modules/bmp085.c b/app/modules/bmp085.c
index a1d9b580..8e911687 100644
--- a/app/modules/bmp085.c
+++ b/app/modules/bmp085.c
@@ -21,7 +21,7 @@ static struct {
     int16_t  MD;
 } bmp085_data;
 
-static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
+static uint8_t r8u(uint32_t id, uint8_t reg) {
     uint8_t ret;
 
     platform_i2c_send_start(id);
@@ -35,32 +35,18 @@ static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
     return ret;
 }
 
-static uint16_t ICACHE_FLASH_ATTR r16u(uint32_t id, uint8_t reg) {
+static uint16_t r16u(uint32_t id, uint8_t reg) {
     uint8_t high = r8u(id, reg);
     uint8_t low  = r8u(id, reg + 1);
     return (high << 8) | low;
 }
 
-static int16_t ICACHE_FLASH_ATTR r16(uint32_t id, uint8_t reg) {
+static int16_t r16(uint32_t id, uint8_t reg) {
     return (int16_t) r16u(id, reg);
 }
 
-static int ICACHE_FLASH_ATTR bmp085_init(lua_State* L) {
-    uint32_t sda;
-    uint32_t scl;
-
-    if (!lua_isnumber(L, 1) || !lua_isnumber(L, 2)) {
-        return luaL_error(L, "wrong arg range");
-    }
-
-    sda = luaL_checkinteger(L, 1);
-    scl = luaL_checkinteger(L, 2);
-
-    if (scl == 0 || sda == 0) {
-        return luaL_error(L, "no i2c for D0");
-    }
-
-    platform_i2c_setup(bmp085_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+static int bmp085_setup(lua_State* L) {
+    (void)L;
 
     bmp085_data.AC1 = r16(bmp085_i2c_id, 0xAA);
     bmp085_data.AC2 = r16(bmp085_i2c_id, 0xAC);
@@ -77,6 +63,28 @@ static int ICACHE_FLASH_ATTR bmp085_init(lua_State* L) {
     return 0;
 }
 
+static int bmp085_init(lua_State* L) {
+    uint32_t sda;
+    uint32_t scl;
+
+    platform_print_deprecation_note("bmp085.init() is replaced by bmp085.setup()", "in the next version");
+
+    if (!lua_isnumber(L, 1) || !lua_isnumber(L, 2)) {
+        return luaL_error(L, "wrong arg range");
+    }
+
+    sda = luaL_checkinteger(L, 1);
+    scl = luaL_checkinteger(L, 2);
+
+    if (scl == 0 || sda == 0) {
+        return luaL_error(L, "no i2c for D0");
+    }
+
+    platform_i2c_setup(bmp085_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+
+    return bmp085_setup(L);
+}
+
 static uint32_t bmp085_temperature_raw_b5(void) {
     int16_t t, X1, X2;
 
@@ -96,16 +104,16 @@ static uint32_t bmp085_temperature_raw_b5(void) {
     return X1 + X2;
 }
 
-static int16_t ICACHE_FLASH_ATTR bmp085_temperature(void) {
+static int16_t bmp085_temperature(void) {
     return (bmp085_temperature_raw_b5() + 8) >> 4;
 }
 
-static int ICACHE_FLASH_ATTR bmp085_lua_temperature(lua_State* L) {
+static int bmp085_lua_temperature(lua_State* L) {
     lua_pushinteger(L, bmp085_temperature());
     return 1;
 }
 
-static int32_t ICACHE_FLASH_ATTR bmp085_pressure_raw(int oss) {
+static int32_t bmp085_pressure_raw(int oss) {
     int32_t p;
     int32_t p1, p2, p3;
 
@@ -132,7 +140,7 @@ static int32_t ICACHE_FLASH_ATTR bmp085_pressure_raw(int oss) {
     return p;
 }
 
-static int ICACHE_FLASH_ATTR bmp085_lua_pressure_raw(lua_State* L) {
+static int bmp085_lua_pressure_raw(lua_State* L) {
     uint8_t oss = 0;
     int32_t p;
 
@@ -148,7 +156,7 @@ static int ICACHE_FLASH_ATTR bmp085_lua_pressure_raw(lua_State* L) {
     return 1;
 }
 
-static int ICACHE_FLASH_ATTR bmp085_lua_pressure(lua_State* L) {
+static int bmp085_lua_pressure(lua_State* L) {
     uint8_t oss = 0;
     int32_t p;
     int32_t X1, X2, X3, B3, B4, B5, B6, B7;
@@ -187,6 +195,8 @@ static const LUA_REG_TYPE bmp085_map[] = {
     { LSTRKEY( "temperature" ),  LFUNCVAL( bmp085_lua_temperature )},
     { LSTRKEY( "pressure" ),     LFUNCVAL( bmp085_lua_pressure )},
     { LSTRKEY( "pressure_raw" ), LFUNCVAL( bmp085_lua_pressure_raw )},
+    { LSTRKEY( "setup" ),        LFUNCVAL( bmp085_setup )},
+    // init() is deprecated
     { LSTRKEY( "init" ),         LFUNCVAL( bmp085_init )},
     { LNILKEY, LNILVAL}
 };
diff --git a/app/modules/hmc5883l.c b/app/modules/hmc5883l.c
index 4f7c4979..ec602966 100644
--- a/app/modules/hmc5883l.c
+++ b/app/modules/hmc5883l.c
@@ -12,7 +12,7 @@
 static const uint32_t hmc5883_i2c_id = 0;
 static const uint8_t hmc5883_i2c_addr = 0x1E;
 
-static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
+static uint8_t r8u(uint32_t id, uint8_t reg) {
     uint8_t ret;
 
     platform_i2c_send_start(id);
@@ -26,7 +26,7 @@ static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
     return ret;
 }
 
-static void ICACHE_FLASH_ATTR w8u(uint32_t id, uint8_t reg, uint8_t val) {
+static void w8u(uint32_t id, uint8_t reg, uint8_t val) {
     platform_i2c_send_start(hmc5883_i2c_id);
     platform_i2c_send_address(hmc5883_i2c_id, hmc5883_i2c_addr, PLATFORM_I2C_DIRECTION_TRANSMITTER);
     platform_i2c_send_byte(hmc5883_i2c_id, reg);
@@ -34,19 +34,9 @@ static void ICACHE_FLASH_ATTR w8u(uint32_t id, uint8_t reg, uint8_t val) {
     platform_i2c_send_stop(hmc5883_i2c_id);
 }
 
-static int ICACHE_FLASH_ATTR hmc5883_init(lua_State* L) {
-
-    uint32_t sda;
-    uint32_t scl;
+static int hmc5883_setup(lua_State* L) {
     uint8_t  devid_a, devid_b, devid_c;
 
-    sda = luaL_checkinteger(L, 1);
-    scl = luaL_checkinteger(L, 2);
-
-    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
-
-    platform_i2c_setup(hmc5883_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
-    
     devid_a = r8u(hmc5883_i2c_id, 10);
     devid_b = r8u(hmc5883_i2c_id, 11);
     devid_c = r8u(hmc5883_i2c_id, 12);
@@ -67,7 +57,24 @@ static int ICACHE_FLASH_ATTR hmc5883_init(lua_State* L) {
     return 0;
 }
 
-static int ICACHE_FLASH_ATTR hmc5883_read(lua_State* L) {
+static int hmc5883_init(lua_State* L) {
+
+    uint32_t sda;
+    uint32_t scl;
+
+    platform_print_deprecation_note("hmc5883l.init() is replaced by hmc5883l.setup()", "in the next version");
+
+    sda = luaL_checkinteger(L, 1);
+    scl = luaL_checkinteger(L, 2);
+
+    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
+
+    platform_i2c_setup(hmc5883_i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+
+    return hmc5883_setup(L);
+}
+
+static int hmc5883_read(lua_State* L) {
 
     uint8_t data[6];
     int x,y,z;
@@ -101,6 +108,8 @@ static int ICACHE_FLASH_ATTR hmc5883_read(lua_State* L) {
 
 static const LUA_REG_TYPE hmc5883_map[] = {
     { LSTRKEY( "read" ),         LFUNCVAL( hmc5883_read )},
+    { LSTRKEY( "setup" ),        LFUNCVAL( hmc5883_setup )},
+    // init() is deprecated
     { LSTRKEY( "init" ),         LFUNCVAL( hmc5883_init )},
     { LNILKEY, LNILVAL}
 };
diff --git a/app/modules/l3g4200d.c b/app/modules/l3g4200d.c
index 95ed90c5..6975fb80 100644
--- a/app/modules/l3g4200d.c
+++ b/app/modules/l3g4200d.c
@@ -12,7 +12,7 @@
 static const uint32_t i2c_id = 0;
 static const uint8_t i2c_addr = 0x69;
 
-static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
+static uint8_t r8u(uint32_t id, uint8_t reg) {
     uint8_t ret;
 
     platform_i2c_send_start(id);
@@ -26,7 +26,7 @@ static uint8_t ICACHE_FLASH_ATTR r8u(uint32_t id, uint8_t reg) {
     return ret;
 }
 
-static void ICACHE_FLASH_ATTR w8u(uint32_t id, uint8_t reg, uint8_t val) {
+static void w8u(uint32_t id, uint8_t reg, uint8_t val) {
     platform_i2c_send_start(i2c_id);
     platform_i2c_send_address(i2c_id, i2c_addr, PLATFORM_I2C_DIRECTION_TRANSMITTER);
     platform_i2c_send_byte(i2c_id, reg);
@@ -34,19 +34,9 @@ static void ICACHE_FLASH_ATTR w8u(uint32_t id, uint8_t reg, uint8_t val) {
     platform_i2c_send_stop(i2c_id);
 }
 
-static int ICACHE_FLASH_ATTR l3g4200d_init(lua_State* L) {
-
-    uint32_t sda;
-    uint32_t scl;
+static int l3g4200d_setup(lua_State* L) {
     uint8_t  devid;
 
-    sda = luaL_checkinteger(L, 1);
-    scl = luaL_checkinteger(L, 2);
-
-    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
-
-    platform_i2c_setup(i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
-    
     devid = r8u(i2c_id, 0xF);
 
     if (devid != 0xD3) {
@@ -58,7 +48,24 @@ static int ICACHE_FLASH_ATTR l3g4200d_init(lua_State* L) {
     return 0;
 }
 
-static int ICACHE_FLASH_ATTR l3g4200d_read(lua_State* L) {
+static int l3g4200d_init(lua_State* L) {
+
+    uint32_t sda;
+    uint32_t scl;
+
+    platform_print_deprecation_note("l3g4200d.init() is replaced by l3g4200d.setup()", "in the next version");
+
+    sda = luaL_checkinteger(L, 1);
+    scl = luaL_checkinteger(L, 2);
+
+    luaL_argcheck(L, sda > 0 && scl > 0, 1, "no i2c for D0");
+
+    platform_i2c_setup(i2c_id, sda, scl, PLATFORM_I2C_SPEED_SLOW);
+
+    return l3g4200d_setup(L);
+}
+
+static int l3g4200d_read(lua_State* L) {
 
     uint8_t data[6];
     int x,y,z;
@@ -91,6 +98,8 @@ static int ICACHE_FLASH_ATTR l3g4200d_read(lua_State* L) {
 
 static const LUA_REG_TYPE l3g4200d_map[] = {
     { LSTRKEY( "read" ),         LFUNCVAL( l3g4200d_read )},
+    { LSTRKEY( "setup" ),        LFUNCVAL( l3g4200d_setup )},
+    // init() is deprecated
     { LSTRKEY( "init" ),         LFUNCVAL( l3g4200d_init )},
     { LNILKEY, LNILVAL}
 };
diff --git a/docs/en/modules/adxl345.md b/docs/en/modules/adxl345.md
index 150e0524..ff9f94ac 100644
--- a/docs/en/modules/adxl345.md
+++ b/docs/en/modules/adxl345.md
@@ -17,7 +17,9 @@ X,Y,Z data (integers)
 
 #### Example
 ```lua
-adxl345.init(1, 2)
+local sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW)  -- call i2c.setup() only once
+adxl345.setup()
 local x,y,z = adxl345.read()
 print(string.format("X = %d, Y = %d, Z = %d", x, y, z))
 ```
@@ -25,6 +27,10 @@ print(string.format("X = %d, Y = %d, Z = %d", x, y, z))
 ## adxl345.init()
 Initializes the module and sets the pin configuration.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `adxl345.setup()` instead.
+
 #### Syntax
 `adxl345.init(sda, scl)`
 
@@ -34,3 +40,15 @@ Initializes the module and sets the pin configuration.
 
 #### Returns
 `nil`
+
+## adxl345.setup()
+Initializes the module.
+
+#### Syntax
+`adxl345.setup()`
+
+#### Parameters
+None
+
+#### Returns
+`nil`
diff --git a/docs/en/modules/am2320.md b/docs/en/modules/am2320.md
index 2db61809..7e9824d6 100644
--- a/docs/en/modules/am2320.md
+++ b/docs/en/modules/am2320.md
@@ -9,6 +9,10 @@ This module provides access to the [AM2320](https://akizukidenshi.com/download/d
 ## am2320.init()
 Initializes the module and sets the pin configuration. Returns model, version, serial but is seams these where all zero on my model.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `am2320.setup()` instead.
+
 #### Syntax
 `model, version, serial = am2320.init(sda, scl)`
 
@@ -35,9 +39,26 @@ Samples the sensor and returns the relative humidity in % and temperature in cel
 
 #### Example
 ```lua
-am2320.init(1, 2)
+sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+am2320.setup()
 rh, t = am2320.read()
 print(string.format("RH: %s%%", rh / 10))
 print(string.format("Temperature: %s degrees C", t / 10))
 ```
 
+## am2320.setup()
+Initializes the module. Returns model, version, serial but is seams these where all zero on my model.
+
+#### Syntax
+`model, version, serial = am2320.setup()`
+
+#### Parameters
+None
+
+#### Returns
+- `model`  16 bits number of model
+- `version`  8 bits version number
+- `serial`  32 bits serial number
+
+   Note: I have only observed values of 0 for all of these, maybe other sensors return more sensible readings.
diff --git a/docs/en/modules/bme280.md b/docs/en/modules/bme280.md
index b5e67d57..2b71cfe4 100644
--- a/docs/en/modules/bme280.md
+++ b/docs/en/modules/bme280.md
@@ -5,7 +5,7 @@
 
 This module provides a simple interface to [BME280/BMP280 temperature/air presssure/humidity sensors](http://www.bosch-sensortec.com/bst/products/all_products/bme280) (Bosch Sensortec).
 
-Note that you must call [`init()`](#bme280init) before you can start reading values!
+Note that you must call [`setup()`](#bme280setup) before you can start reading values!
 
 ## bme280.altitude()
 
@@ -69,13 +69,72 @@ none
 
 Initializes module. Initialization is mandatory before read values.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `bme280.setup()` instead.
+
 #### Syntax
 
 `bme280.init(sda, scl, [temp_oss, press_oss, humi_oss, power_mode, inactive_duration, IIR_filter])`
 
 #### Parameters
-- `sda` - SDA pin  
-- `scl` - SCL pin
+See [`setup()`](#bme280setup).
+
+## bme280.qfe2qnh()
+
+For given altitude converts the air pressure to sea level air pressure.
+
+#### Syntax
+`bme280.qfe2qnh(P, altitude)`
+
+#### Parameters
+- `P` measured pressure
+- `altitude` altitude in meters of measurement point
+
+#### Returns  
+sea level pressure
+
+
+## bme280.read()
+
+Reads the sensor and returns the temperature, the air pressure, the air relative humidity and 
+
+#### Syntax
+`bme280.read([altitude])`
+
+#### Parameters
+- (optional) `altitude`- altitude in meters of measurement point. If provided also the air pressure converted to sea level air pressure is returned.
+
+#### Returns  
+- `T` temperature in celsius as an integer multiplied with 100
+- `P` air pressure in hectopascals multiplied by 1000
+- `H` relative humidity in percent multiplied by 1000
+- `QNH` air pressure in hectopascals multiplied by 1000 converted to sea level
+
+Any of these variables is `nil` if the readout of given measure was not successful.
+
+## bme280.startreadout()
+Starts readout (turns the sensor into forced mode). After the readout the sensor turns to sleep mode.
+
+#### Syntax
+`bme280.startreadout(delay, callback)`
+
+#### Parameters
+- `delay` sets sensor to forced mode and calls the `callback` (if provided) after given number of milliseconds. For 0 the default delay is set to 113ms (sufficient time to perform reading for oversampling settings 16x). For different oversampling setting please refer to [BME280 Final Datasheet - Appendix B: Measurement time and current calculation](http://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280_DS001-11.pdf#page=51).
+- `callback` if provided it will be invoked after given `delay`. The sensor reading should be finalized by then so.
+
+#### Returns  
+`nil`
+
+## bme280.setup()
+
+Initializes module. Initialization is mandatory before read values.
+
+#### Syntax
+
+`bme280.setup([temp_oss, press_oss, humi_oss, power_mode, inactive_duration, IIR_filter])`
+
+#### Parameters
 - (optional) `temp_oss` - Controls oversampling of temperature data. Default oversampling is 16x.
 - (optional) `press_oss` - Controls oversampling of pressure data. Default oversampling is 16x.
 - (optional) `humi_oss` - Controls oversampling of humidity data. Default oversampling is 16x
@@ -127,7 +186,9 @@ Using forced mode is recommended for applications which require low sampling rat
 ```lua
 alt=320 -- altitude of the measurement place
 
-bme280.init(3, 4)
+sda, scl = 3, 4
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+bme280.setup()
 
 P, T = bme280.baro()
 print(string.format("QFE=%d.%03d", P/1000, P%1000))
@@ -157,7 +218,9 @@ Or simpler and more efficient
 ```lua
 alt=320 -- altitude of the measurement place
 
-bme280.init(3, 4)
+sda, scl = 3, 4
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+bme280.setup()
 
 T, P, H, QNH = bme280.read(alt)
 local Tsgn = (T < 0 and -1 or 1); T = Tsgn*T
@@ -176,11 +239,13 @@ local curAltsgn = (curAlt < 0 and -1 or 1); curAlt = curAltsgn*curAlt
 print(string.format("altitude=%s%d.%02d", curAltsgn<0 and "-" or "", curAlt/100, curAlt%100))
 ```
 
-Use `bme280.init(sda, scl, 1, 3, 0, 3, 0, 4)` for "game mode" - Oversampling settings  pressure ×4, temperature ×1, humidity ×0, sensor mode: normal mode, inactive duration  = 0.5 ms, IIR filter settings  filter coefficient 16.
+Use `bme280.setup(1, 3, 0, 3, 0, 4)` for "game mode" - Oversampling settings  pressure ×4, temperature ×1, humidity ×0, sensor mode: normal mode, inactive duration  = 0.5 ms, IIR filter settings  filter coefficient 16.
 
 Example of readout in forced mode (asynchronous)
 ```lua
-bme280.init(3, 4, nil, nil, nil, 0) -- initialize to sleep mode
+sda, scl = 3, 4
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+bme280.setup(nil, nil, nil, 0) -- initialize to sleep mode
 bme280.startreadout(0, function ()
   T, P = bme280.read()
   local Tsgn = (T < 0 and -1 or 1); T = Tsgn*T
@@ -188,52 +253,6 @@ bme280.startreadout(0, function ()
 end)
 ```
 
-## bme280.qfe2qnh()
-
-For given altitude converts the air pressure to sea level air pressure.
-
-#### Syntax
-`bme280.qfe2qnh(P, altitude)`
-
-#### Parameters
-- `P` measured pressure
-- `altitude` altitude in meters of measurement point
-
-#### Returns  
-sea level pressure
-
-
-## bme280.read()
-
-Reads the sensor and returns the temperature, the air pressure, the air relative humidity and 
-
-#### Syntax
-`bme280.read([altitude])`
-
-#### Parameters
-- (optional) `altitude`- altitude in meters of measurement point. If provided also the air pressure converted to sea level air pressure is returned.
-
-#### Returns  
-- `T` temperature in celsius as an integer multiplied with 100
-- `P` air pressure in hectopascals multiplied by 1000
-- `H` relative humidity in percent multiplied by 1000
-- `QNH` air pressure in hectopascals multiplied by 1000 converted to sea level
-
-Any of these variables is `nil` if the readout of given measure was not successful.
-
-## bme280.startreadout()
-Starts readout (turns the sensor into forced mode). After the readout the sensor turns to sleep mode.
-
-#### Syntax
-`bme280.startreadout(delay, callback)`
-
-#### Parameters
-- `delay` sets sensor to forced mode and calls the `callback` (if provided) after given number of milliseconds. For 0 the default delay is set to 113ms (sufficient time to perform reading for oversampling settings 16x). For different oversampling setting please refer to [BME280 Final Datasheet - Appendix B: Measurement time and current calculation](http://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280_DS001-11.pdf#page=51).
-- `callback` if provided it will be invoked after given `delay`. The sensor reading should be finalized by then so.
-
-#### Returns  
-`nil`
-
 ## bme280.temp()
 
 Reads the sensor and returns the temperature in celsius as an integer multiplied with 100.
diff --git a/docs/en/modules/bmp085.md b/docs/en/modules/bmp085.md
index 1bb96aa2..5df899ab 100644
--- a/docs/en/modules/bmp085.md
+++ b/docs/en/modules/bmp085.md
@@ -9,6 +9,10 @@ This module provides access to the [BMP085](https://www.sparkfun.com/tutorials/2
 ## bmp085.init()
 Initializes the module and sets the pin configuration.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `bmp085.setup()` instead.
+
 #### Syntax
 `bmp085.init(sda, scl)`
 
@@ -19,6 +23,18 @@ Initializes the module and sets the pin configuration.
 #### Returns
 `nil`
 
+## bmp085.setup()
+Initializes the module.
+
+#### Syntax
+`bmp085.setup()`
+
+#### Parameters
+None
+
+#### Returns
+`nil`
+
 ## bmp085.temperature()
 Samples the sensor and returns the temperature in celsius as an integer multiplied with 10.
 
@@ -30,7 +46,9 @@ temperature multiplied with 10 (integer)
 
 #### Example
 ```lua
-bmp085.init(1, 2)
+local sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW)
+bmp085.setup()
 local t = bmp085.temperature()
 print(string.format("Temperature: %s.%s degrees C", t / 10, t % 10))
 ```
@@ -53,7 +71,9 @@ pressure in pascals (integer)
 
 #### Example
 ```lua
-bmp085.init(1, 2)
+local sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+bmp085.setup()
 local p = bmp085.pressure()
 print(string.format("Pressure: %s.%s mbar", p / 100, p % 100))
 ```
diff --git a/docs/en/modules/hmc5883l.md b/docs/en/modules/hmc5883l.md
index 213dc0c2..43f535f8 100644
--- a/docs/en/modules/hmc5883l.md
+++ b/docs/en/modules/hmc5883l.md
@@ -18,7 +18,9 @@ temperature multiplied with 10 (integer)
 
 #### Example
 ```lua
-hmc58831.init(1, 2)
+local sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+hmc58831.setup()
 local x,y,z = hmc5883l.read()
 print(string.format("x = %d, y = %d, z = %d", x, y, z))
 ```
@@ -26,6 +28,10 @@ print(string.format("x = %d, y = %d, z = %d", x, y, z))
 ## hmc5883l.init()
 Initializes the module and sets the pin configuration.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `hmc5883l.setup()` instead.
+
 #### Syntax
 `hmc5883l.init(sda, scl)`
 
@@ -35,3 +41,15 @@ Initializes the module and sets the pin configuration.
 
 #### Returns
 `nil`
+
+## hmc5883l.setup()
+Initializes the module.
+
+#### Syntax
+`hmc5883l.setup()`
+
+#### Parameters
+None
+
+#### Returns
+`nil`
diff --git a/docs/en/modules/l3g4200d.md b/docs/en/modules/l3g4200d.md
index 9f47918b..5f667cf5 100644
--- a/docs/en/modules/l3g4200d.md
+++ b/docs/en/modules/l3g4200d.md
@@ -17,7 +17,9 @@ X,Y,Z gyroscope output
 
 #### Example
 ```lua
-l3g4200d.init(1, 2)
+local sda, scl = 1, 2
+i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
+l3g4200d.setup()
 local x,y,z = l3g4200d.read()
 print(string.format("X = %d, Y = %d, Z = %d", x, y, z)
 ```
@@ -25,6 +27,10 @@ print(string.format("X = %d, Y = %d, Z = %d", x, y, z)
 ## l3g4200d.init()
 Initializes the module and sets the pin configuration.
 
+!!! attention
+
+    This function is deprecated and will be removed in upcoming releases. Use `l3g4200d.setup()` instead.
+
 #### Syntax
 `l3g4200d.init(sda, scl)`
 
@@ -34,3 +40,15 @@ Initializes the module and sets the pin configuration.
 
 #### Returns
 `nil`
+
+## l3g4200d.setup()
+Initializes the module.
+
+#### Syntax
+`l3g4200d.setup()`
+
+#### Parameters
+None
+
+#### Returns
+`nil`