Forgive me for the small offtop but I had to write it Returning to the problem, maybe this page will help you when you have finished connecting. the advantages and disadvantages of this communication protocol. Serial comm options on Arduino (s) ESP8266 and Arduino needs 2 serial comms either 1 hardware 1 software or 2 hardware serial. Be sure to score a line to separate the copper strips from shorting the adjacent pins. You learn which practical examples: which pins you need for Arduino and ESP8266 microcontroller to connect devices through I2C. This is made of a 4x4 veroboard, PCB headers, and jumper header. In this tutorial we dive deeper into the I2C communication protocol. In the end, to my delight, I solved a problem that was very banal, so to use the RX, TX pins you need to use the "Serial1" command and not the "Serial" itself when communicating with the BT module, of course in my case. I2C Tutorial for Arduino, ESP8266 and ESP32. However, after a while I realized that I would miss these pins for the project so I started looking again for what might be wrong. The signal levels of the ESP8266 module are 3.3V but the Arduino board runs at 5V, you need to use a resistive voltage divider to convert the TX output. But if i programmatically send particular AT commands there is no response. I can successfully send AT commands and get response when communicating through the terminal. TX and RX hardware pins did not work, so I looked for information on the network, three days to no avail, and then used the Software Series on other pins. Note that pin 0 of the Arduino board selected as RX connects to the TX pin of the Bluetooth module, and pin 1 of the Arduino board selected as TX connects to the RX pin of the ESP8266 module. I am communicating with ESP8266 using SoftwareSerial of Arduino UNO. I suggest you start again from the beginning and slowly move forward because I had, like you, but with a Bluetooth module. char servoPin D1 to save pin and myservo. etc and I can't find a conversion chart anywhere so I attempted the following. but with the ESP8266 there is no pin 1, 2, 3. Is also right that you read either without understanding or too little information about connecting the module to Ardu because it is full. I wanted to save pin D1 into a variable and use it to declare pinmode and when using pin. And believe me that he has a lot more knowledge and will definitely help you in more serious problems so don't be surprised that he responds in such a tone. In addition, I understand a little frustration of colleague "Piotrus_999" because he must answer (without offense) silly questions like "where is plus and where minus" for the "time" enty. Where did you find the diagram to connect the RX pin to RX since it is short for Received? You understand what I mean? Transmission-> Reception and not Reception-> Reception. Buddy "mr_bl" slowly ask and believe me that you will get the right help but without exaggeration.
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