ESP8266 Community Forum

- Tue Jun 07, 2016 12:32 pm #48719 Hi,
I am little confused about reading digital and analog values on ESP8266-01 chip. I tried reading values from DHT11 sensor and did it successfully. To my understanding, the values are analog.
Then I tried reading values from soil moisture sensor. This sensor has both AO and DO output. I tried ESP8266-01 GPIO0 with both AO and DO of soil sensor and all I was getting was 0 and 1 values.
My query is if ESP8266-01 can read values from DHT11 sensor, why it is just reading 0 and 1 from soil moisture sensor and not the actual analog value. Is there a way that I can read values using ESP-01.
Thanks in advance.

- Wed Jun 08, 2016 12:24 pm #48792 Although the ESP8266 does have an ADC, the pin isn't exposed on the ESP-01 module so you can't use it without modifying the hardware. You need one of the boards that exposes more of the pins such as the ESP-12.