mirror of
https://github.com/letscontrolit/ESPEasy.git
synced 2026-07-28 04:07:47 +00:00
87 lines
3.1 KiB
Arduino
87 lines
3.1 KiB
Arduino
//#######################################################################################################
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//#################################### Plugin 007: ExtWiredAnalog #######################################
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//#######################################################################################################
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/*********************************************************************************************\
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* This plugin provides support for 4 extra analog inputs, using the PCF8591 (NXP/Philips)
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* Support : www.esp8266.nu
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* Date : Apr 2015
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* Compatibility : R004
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* Syntax : "ExtWiredAnalog <Par1:Port>, <Par2:Variable>"
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*********************************************************************************************
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* Technical description:
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*
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* The PCF8591 is a IO Expander chip that connects through the I2C bus
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* Basic I2C address = 0x48
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* Each chip has 4 analog inputs
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* This commando reads the analog input and stores the result into a variable
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\*********************************************************************************************/
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#define PLUGIN_007
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#define PLUGIN_ID_007 7
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#define PLUGIN_NAME_007 "Analog input - PCF8591"
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#define PLUGIN_VALUENAME1_007 "Analog"
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boolean Plugin_007(byte function, struct EventStruct *event, String& string)
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{
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boolean success = false;
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static byte portValue = 0;
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switch (function)
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{
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case PLUGIN_DEVICE_ADD:
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{
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Device[++deviceCount].Number = PLUGIN_ID_007;
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Device[deviceCount].Type = DEVICE_TYPE_I2C;
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Device[deviceCount].VType = SENSOR_TYPE_SINGLE;
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Device[deviceCount].Ports = 4;
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Device[deviceCount].PullUpOption = false;
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Device[deviceCount].InverseLogicOption = false;
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Device[deviceCount].FormulaOption = true;
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Device[deviceCount].ValueCount = 1;
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Device[deviceCount].SendDataOption = true;
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Device[deviceCount].TimerOption = true;
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Device[deviceCount].GlobalSyncOption = true;
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break;
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}
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case PLUGIN_GET_DEVICENAME:
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{
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string = F(PLUGIN_NAME_007);
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break;
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}
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case PLUGIN_GET_DEVICEVALUENAMES:
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{
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strcpy_P(ExtraTaskSettings.TaskDeviceValueNames[0], PSTR(PLUGIN_VALUENAME1_007));
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break;
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}
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case PLUGIN_READ:
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{
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byte unit = (Settings.TaskDevicePort[event->TaskIndex] - 1) / 4;
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byte port = Settings.TaskDevicePort[event->TaskIndex] - (unit * 4);
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uint8_t address = 0x48 + unit;
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// get the current pin value
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Wire.beginTransmission(address);
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Wire.write(port - 1);
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Wire.endTransmission();
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Wire.requestFrom(address, (uint8_t)0x2);
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if (Wire.available())
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{
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Wire.read(); // Read older value first (stored in chip)
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UserVar[event->BaseVarIndex] = (float)Wire.read(); // now read actual value and store into Nodo var
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String log = F("PCF : Analog value: ");
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log += UserVar[event->BaseVarIndex];
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addLog(LOG_LEVEL_INFO,log);
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success = true;
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}
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break;
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}
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}
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return success;
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}
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