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Stevesteve I have found the solution to this problem, its caused by the cts pin on the module being shorted to ground and forcing the module into boot loader mode when connected via serial. The fix is to de solder the metal sheilding box from the unit to gain access to the module inside, then cut the trace to the cts pin. with the shielding removed, pin 1 being the pin on the left side and pin 7 on the right, you need to cut the trace to pin 5. carefully make a slice with a sharp blade just before the silver solder pad. After doing this, the radio on your aircraft side will work as it should on the uart/serial cable. An explantion and image of what needs to be done can be found here: https://diydrones.com/forum/topics/3dr-telemetry-always-bootloader

2018-12-12 10:50:52 Helpful (2)
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