![]() I took an initial look into it and found it difficult to use. I have no experience with using the AT-firmware. Any idea, suggestion is welcome, Thank you. I searched this forum and did not encounter a similar problem. I don't know why the Arduino can't read data from the NDU module. I found that the MDU was sending correct responses to commands from the Arduino. The TX line of the NDU, which is connected to the RX line of the ARD, I connected in parallel with a special USB TTL adapter. When ARD is connected to MDU I have proved that NDU receives correct data from ARD. When I connect ARD to NDU and enter an empty program in ARD, then the ARD Serial Monitor exchanges data with the NDU module. I also connected the NDU to a USB serial TTL port. That's why I connected the Arduino to a USB Serial TTL adapter. I tested the same program with MEGA 2560 and the result is the same - wrong. The Arduino does not receive data from the NDU. I use SoftwareSerial to communicate with NDM. In Arduino, I uploaded a terminal emulation program. ![]() I connected the ARD to the NDU via a serial port (ARD TX - RX NDU, ARD RX - TX NDU), I connected the Transmit line from the Arduino via a voltage divider to the receiving line of the NDU. ![]() ![]() I want the Arduino to exchange data with a UDP / TCP server. Arduino (ARD) does not read data from NODEMCU (NDU) ![]()
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