How to read analog converted value 18bit => 262143

I NEVER GET 18 BIT RESOLUTION IN INDUSTRUINO ITS 12 BIT ANALOG.

Hi, please note that when you set/change the resolution, you need to do that before setting the input mode of the channels, or repeat a line like 'Indio.analogReadMode(1, mA);' after you have changed the resolution. if not clear, send me an email and i send you example code

/* Indio Library, by Rustem Iskuzhin for Industruino - wwww.industruino.com This library enables communication with the Industruino IND.I/O Baseboard. The IND.I/O Baseboard has 8CH of 24V digital I/O (6.5-32V supported), 4CH 0-10V/4-20mA ADC, 2CH 0-10V/4-20mA DAC, RS485 transceiver. WARNING!: PLEASE BE VERY CAREFUL WHEN CONNECTING PERIPHERALS TO YOUR IND.I/O AND CONFIGURING THE DIRECTION OF THE I/O. THE FAILURE MODE OF A 24V SHORTED CONNECTION IS MUCH MORE SPECTACULAR THAN WHEN WORKING AT 5V. Please find the calibration data array inside the Indio.cpp library file, together with an explanation on how to perform the calibration. Library is preloaded with calibration data but characterisctics are board specific thus reading with standard cal. data might be off. */ #include #include #include #include static UC1701 lcd; float AudioVoltage, HandsfreeVoltage, CruiseVoltage, SupplyVoltage; //variables to hold your sensor data #define TxEnablePin 9 // INDUSTRUINO RS485 #define baud 115200 // tested 9600 to 115200 #define SlaveID 1 #define HOLDING_REGS_SIZE 8 unsigned int holdingRegs[HOLDING_REGS_SIZE]; void setup() { lcd.begin(); lcd.clear(); lcd.setCursor(1, 1); lcd.print("Yes Enterprises"); lcd.setCursor(1, 2); lcd.print("Resistance Meter"); analogWrite(13, 100); // LCD backlight modbus_configure(&Serial1, baud, SERIAL_8N1, SlaveID, TxEnablePin, HOLDING_REGS_SIZE, holdingRegs); modbus_update_comms(baud, SERIAL_8N2, SlaveID); Indio.setADCResolution(16); // Set the ADC resolution. Choices are 12bit@240SPS, 14bit@60SPS, 16bit@15SPS and 18bit@3.75SPS. Indio.analogReadMode(1, V10); // Set Analog-In CH1 to 10V mode (0-10V). Indio.analogReadMode(2, V10); // Indio.analogReadMode(3, V10); // Indio.analogReadMode(4, V10); // } void loop() { modbus_update(); AudioVoltage = Indio.analogRead(1); //Read Analog-In CH1 (output depending on selected mode) HandsfreeVoltage = Indio.analogRead(2); //Read Analog-In CH1 (output depending on selected mode) CruiseVoltage = Indio.analogRead(3); //Read Analog-In CH1 (output depending on selected mode) SupplyVoltage=Indio.analogRead(4)*2; //Read Analog-In CH1 (output depending on selected mode) //SupplyVoltage=11.5; unsigned int AudioResistance = Resistance(SupplyVoltage, (SupplyVoltage-AudioVoltage), 540.0); unsigned int HandsfreeResistance = Resistance(SupplyVoltage, (SupplyVoltage-HandsfreeVoltage), 540.0); unsigned int CruiseResistance = Resistance(SupplyVoltage, (SupplyVoltage-CruiseVoltage), 540.0); lcd.setCursor(1, 4); lcd.print((float)AudioResistance/10.0); lcd.setCursor(1, 5); lcd.print((float)HandsfreeResistance/10.0); lcd.setCursor(1, 6); lcd.print((float)CruiseResistance/10.0); lcd.setCursor(1, 7); lcd.print(SupplyVoltage); holdingRegs[0] = AudioResistance%255; // set register according to button on Slave holdingRegs[1] = AudioResistance/255; holdingRegs[2] = HandsfreeResistance%255; holdingRegs[3] = HandsfreeResistance/255; holdingRegs[4] = CruiseResistance%255; holdingRegs[5] = CruiseResistance/255; holdingRegs[6] = 6; holdingRegs[7] = 7; } unsigned int Resistance(float inputsupply, float AI_Volt, float fixedR) { float I = (inputsupply-AI_Volt)/fixedR; float R = (AI_Volt)/I; return (unsigned int)(R*10); }