Hi, I recently bought some GT-38 modules, they are supposedly an HC-12 replacement and work in the same fashion (https://www.electrodragon.com/w/GT-38). I tried to change the baudrate with no luck and I can't get them to do anything. I tried sending the command AT while the SET pin is tied to ground but I get no response. The only thing that gets an answer from the module is when I send the command AT+RB and its ERROR. Has somebody used this module or know what causes this?
Thanks in advance!
Thanks in advance!