83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
// Module for interfacing with the DHTxx sensors (xx = 11-21-22-33-44).
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#include "module.h"
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#include "lauxlib.h"
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#include "platform.h"
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#include "cpu_esp8266.h"
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#include "dht/dht.h"
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#define NUM_DHT GPIO_PIN_NUM
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// ****************************************************************************
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// DHT functions
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int platform_dht_exists( unsigned id )
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{
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return ((id < NUM_DHT) && (id > 0));
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}
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static void aux_read( lua_State *L )
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{
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double temp = dht_getTemperature();
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double humi = dht_getHumidity();
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int tempdec = (int)((temp - (int)temp) * 1000);
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int humidec = (int)((humi - (int)humi) * 1000);
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lua_pushnumber( L, (lua_Float) temp );
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lua_pushnumber( L, (lua_Float) humi );
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lua_pushinteger( L, tempdec );
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lua_pushinteger( L, humidec );
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}
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// Lua: status, temp, humi, tempdec, humidec = dht.read( id )
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static int dht_lapi_read( lua_State *L )
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{
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unsigned id = luaL_checkinteger( L, 1 );
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MOD_CHECK_ID( dht, id );
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lua_pushinteger( L, dht_read(id, DHT_NON11) );
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aux_read( L );
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return 5;
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}
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// Lua: status, temp, humi, tempdec, humidec = dht.read11( id ))
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static int dht_lapi_read11( lua_State *L )
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{
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unsigned id = luaL_checkinteger( L, 1 );
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MOD_CHECK_ID( dht, id );
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lua_pushinteger( L, dht_read(id, DHT11) );
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aux_read( L );
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return 5;
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}
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// Lua: status, temp, humi, tempdec, humidec = dht.read12( id ))
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static int dht_lapi_read12( lua_State *L )
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{
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unsigned id = luaL_checkinteger( L, 1 );
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MOD_CHECK_ID( dht, id );
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lua_pushinteger( L, dht_read(id, DHT12) );
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aux_read( L );
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return 5;
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}
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// Lua: status, temp, humi, tempdec, humidec = dht.readxx( id ))
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static int dht_lapi_readxx( lua_State *L )
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{
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unsigned id = luaL_checkinteger( L, 1 );
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MOD_CHECK_ID( dht, id );
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lua_pushinteger( L, dht_read(id, DHT22) );
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aux_read( L );
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return 5;
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}
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// Module function map
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LROT_BEGIN(dht, NULL, 0)
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LROT_FUNCENTRY( read, dht_lapi_read )
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LROT_FUNCENTRY( read11, dht_lapi_read11 )
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LROT_FUNCENTRY( read12, dht_lapi_read12 )
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LROT_FUNCENTRY( readxx, dht_lapi_read )
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LROT_NUMENTRY( OK, DHTLIB_OK )
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LROT_NUMENTRY( ERROR_CHECKSUM, DHTLIB_ERROR_CHECKSUM )
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LROT_NUMENTRY( ERROR_TIMEOUT, DHTLIB_ERROR_TIMEOUT )
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LROT_END(dht, NULL, 0)
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NODEMCU_MODULE(DHT, "dht", dht, NULL);
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