Hi everyone, I have two HM10 BLE modules (one brand new and one used). I am also connecting it to the computer via the FTDI cable and using some AT-commands in the Arduino serial monitor. However, when I enter "AT+NAME?", only the brand new responded appropriately while the used HM10 BLE module did not responded (both connected using the same circuit; only one connected at a time). However, both modules are able to receive data when I connect it via an app on my phone and test it out with an LED. How do I get the used HM10 module to display the appropriate data using the serial monitor? Should I do a factory reset on it? If yes, how? Thank you in advance!
It they don't have the same firmware they may have different requirements for issuing AT commands. Read Talking to the module on the guide by Martyn Currey.
There is a lot of discussion around about kosher and fake HM-10s that you might need to check out. I don't think it matters under normal circumstances, but it might in your case.