Hello, Thanks for your response, Here is the datasheet of the sensor: https://files.seeedstudio.com/wiki/Dissolved-Oxygen-Sensor/Datasheet-Dissolved_Oxygen_Sensor.pdf Here is the circuit of the esp32 and the TTL converter MAX485 Noting that the converter needs 5V and the sensor 12V, I used Buck-Boos...

Hello, Thanks for your response, Here is the datasheet of the sensor: https://files.seeedstudio.com/wiki/Dissolved-Oxygen-Sensor/Datasheet-Dissolved_Oxygen_Sensor.pdf Here is a simulation of the circuit connection; I am using a TTL converter MAX 485, noting that the converter needs 5V and the sensor...

Hello, I want to work with a sensor that uses Modbus as a communication protocol, to be able to use ESP32, I am using a TTL MAX485 converter. Unfortunately the sensor is not responsing, sometimes it responds with the same request I send, sometimes it displaying nothing in the serial monitor. Please ...