The model of my card is Nodemcu Amica, with CP2102 chipset. I was installing and using my software with Arduino IDE. Now it doesn't run my codes. Strange characters also appear on the serial monitor. AT or Lua commands do not work either. I have installed and tried many firmware to fix this situation. I was only able to run the lua code with the firmware named nodemcu_float_0.9.6-dev_20150704.bin. As far as I understand, there is no hardware problem. But I think the software it came with is damaged. I want to find the firmware that comes with it when it comes from the factory and install it, but I couldn't find the correct one. If you could help me it would be greatly appreciated. Thank you from now.