ESP12F and TDS sensor
Posted: Fri Oct 02, 2020 3:51 amHi newb here not sure if this is the correct thread to post this...
I been trying to wire up my TDS sensor with ESP12F bare metal module. I can get the TDS sensor to work with Nodemcu module since it has internal voltage divider.
However with ESP12F , I know that it need voltage divider and I'm still learning how to properly wire it up. I'm using the https://ohmslawcalculator.com/voltage-divider-calculator to get voltage down to 1v. I had tried with a number of resistor combinations that I had laying around to get the output voltage for the A0 down to 1v. At the moment I'm using 220 ohm + 150 ohm which output 0.93v max. However the sensor unable to read voltage output by the sensor. I did measure voltage output from sensor and it did provide the intended voltage. However when i connect to the voltage divider circuit, it didn't work. Voltage output drop down to 0.01-0.04v.
My TDS sensor is from https://wiki.dfrobot.com/Gravity__Analog_TDS_Sensor___Meter_For_Arduino_SKU__SEN0244. THis TDS sensor does works with Nodemcu.
Where did i do wrong?
Still learning ESP12F module..go easy..
I been trying to wire up my TDS sensor with ESP12F bare metal module. I can get the TDS sensor to work with Nodemcu module since it has internal voltage divider.
However with ESP12F , I know that it need voltage divider and I'm still learning how to properly wire it up. I'm using the https://ohmslawcalculator.com/voltage-divider-calculator to get voltage down to 1v. I had tried with a number of resistor combinations that I had laying around to get the output voltage for the A0 down to 1v. At the moment I'm using 220 ohm + 150 ohm which output 0.93v max. However the sensor unable to read voltage output by the sensor. I did measure voltage output from sensor and it did provide the intended voltage. However when i connect to the voltage divider circuit, it didn't work. Voltage output drop down to 0.01-0.04v.
My TDS sensor is from https://wiki.dfrobot.com/Gravity__Analog_TDS_Sensor___Meter_For_Arduino_SKU__SEN0244. THis TDS sensor does works with Nodemcu.
Where did i do wrong?
Still learning ESP12F module..go easy..