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_P025_ADS1115.ino
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_P025_ADS1115.ino
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//#######################################################################################################
//#################################### Plugin 025: ADS1115 I2C 0x48) ###############################################
//#######################################################################################################
#define PLUGIN_025
#define PLUGIN_ID_025 25
#define PLUGIN_NAME_025 "Analog input - ADS1115"
#define PLUGIN_VALUENAME1_025 "Analog"
boolean Plugin_025_init = false;
static uint16_t readRegister025(uint8_t i2cAddress, uint8_t reg) {
Wire.beginTransmission(i2cAddress);
Wire.write((0x00));
Wire.endTransmission();
Wire.requestFrom(i2cAddress, (uint8_t)2);
return ((Wire.read() << 8) | Wire.read());
}
boolean Plugin_025(byte function, struct EventStruct *event, String& string)
{
boolean success = false;
static byte portValue = 0;
switch (function)
{
case PLUGIN_DEVICE_ADD:
{
Device[++deviceCount].Number = PLUGIN_ID_025;
Device[deviceCount].Type = DEVICE_TYPE_I2C;
Device[deviceCount].VType = SENSOR_TYPE_SINGLE;
Device[deviceCount].Ports = 4;
Device[deviceCount].PullUpOption = false;
Device[deviceCount].InverseLogicOption = false;
Device[deviceCount].FormulaOption = true;
Device[deviceCount].ValueCount = 1;
Device[deviceCount].SendDataOption = true;
Device[deviceCount].TimerOption = true;
Device[deviceCount].GlobalSyncOption = true;
break;
}
case PLUGIN_GET_DEVICENAME:
{
string = F(PLUGIN_NAME_025);
break;
}
case PLUGIN_GET_DEVICEVALUENAMES:
{
strcpy_P(ExtraTaskSettings.TaskDeviceValueNames[0], PSTR(PLUGIN_VALUENAME1_025));
break;
}
case PLUGIN_WEBFORM_LOAD:
{
#define ADS1115_GAIN_OPTION 6
byte choice = Settings.TaskDevicePluginConfig[event->TaskIndex][0];
String options[ADS1115_GAIN_OPTION];
uint optionValues[ADS1115_GAIN_OPTION];
optionValues[0] = (0x00);
options[0] = F("2/3x gain 6.144V 0.1875mV");
optionValues[1] = (0x02);
options[1] = F("1x gain 4.096V 0.125mV");
optionValues[2] = (0x04);
options[2] = F("2x gain 2.048V 0.0625mV");
optionValues[3] = (0x06);
options[3] = F("4x gain 1.024V 0.03125mV");
optionValues[4] = (0x08);
options[4] = F("8x gain 0.512V 0.015625mV");
optionValues[5] = (0x0A);
options[5] = F("16x gain 0.256V 0.0078125mV");
string += F("<TR><TD>Gain:<TD><select name='plugin_025_gain'>");
for (byte x = 0; x < ADS1115_GAIN_OPTION; x++)
{
string += F("<option value='");
string += optionValues[x];
string += "'";
if (choice == optionValues[x])
string += F(" selected");
string += ">";
string += options[x];
string += F("</option>");
}
string += F("</select>");
success = true;
break;
}
case PLUGIN_WEBFORM_SAVE:
{
String plugin1 = WebServer.arg("plugin_025_gain");
Settings.TaskDevicePluginConfig[event->TaskIndex][0] = plugin1.toInt();
Plugin_025_init = false; // Force device setup next time
success = true;
break;
}
case PLUGIN_INIT:
{
Plugin_025_init = true;
success = true;
break;
}
case PLUGIN_READ:
{
uint8_t m_gain = Settings.TaskDevicePluginConfig[event->TaskIndex][0];
int value;
value = 0;
byte unit = (Settings.TaskDevicePort[event->TaskIndex] - 1) / 4;
byte port = Settings.TaskDevicePort[event->TaskIndex] - (unit * 4);
uint8_t address = 0x48 + unit;
// get the current pin value
uint16_t config = (0x0003) | // Disable the comparator (default val)
(0x0000) | // Non-latching (default val)
(0x0000) | // Alert/Rdy active low (default val)
(0x0000) | // Traditional comparator (default val)
(0x0080) | // 1600 samples per second (default)
(0x0100) ; // Single-shot mode (default)
// m_Gain = (0x0000); // 2/3x gain +/- 6.144V 1 bit = 3mV 0.1875mV (default)
// m_Gain = (0x0200); // 1x gain +/- 4.096V 1 bit = 2mV 0.125mV
// m_Gain = (0x0400); // 2x gain +/- 2.048V 1 bit = 1mV 0.0625mV
// m_Gain = (0x0600); // 4x gain +/- 1.024V 1 bit = 0.5mV 0.03125mV
// m_Gain = (0x0800); // 8x gain +/- 0.512V 1 bit = 0.25mV 0.015625mV
// m_Gain = (0x0A00); // 16x gain +/- 0.256V 1 bit = 0.125mV 0.0078125mV
// config |= m_gain;
// config |= (0x0000);
switch (m_gain)
{
case (0x00):
config |= (0x0000);
break;
case (0x02):
config |= (0x0200);
break;
case (0x04):
config |= (0x0400);
break;
case (0x06):
config |= (0x0600);
break;
case (0x08):
config |= (0x0800);
break;
case (0x0A):
config |= (0x0A00);
break;
}
switch (port)
{
case (1):
config |= (0x4000);
break;
case (2):
config |= (0x5000);
break;
case (3):
config |= (0x6000);
break;
case (4):
config |= (0x7000);
break;
}
config |= (0x8000);
Wire.beginTransmission(address);
Wire.write((uint8_t)(0x01));
Wire.write((uint8_t)(config>>8));
Wire.write((uint8_t)(config & 0xFF));
Wire.endTransmission();
delay(8);
UserVar[event->BaseVarIndex] = (float) readRegister025((address), (0x00)) ;
String log = F("ADS1115 : Analog value: ");
log += UserVar[event->BaseVarIndex];
addLog(LOG_LEVEL_INFO,log);
success = true;
break;
}
}
return success;
}