Hi,
I have been developing using some development modules from WaveShare (based on the nRF51822 QFAC) and they work fine.
However, I'm now trying to use a module better suited small scale deployment, which I sourced from AliExpress
www.aliexpress.com/.../32486456702.html
And the module does not seem to work at all, after I upload exactly the same code as for the QFAC module.
I know the QFAA is 16k RAM and the QFAC is 32k, but I don't think this is the problem, because I tried loading a precompiled bootloader (from RedBearLab) for one of their products which uses the QFAA and I still do not get any advertising packets on BLE :-(
I know the module was originally working, as it came pre-flashed with some sort of BLE to Serial / AT command set firmware, and it was visible on BLE.
However after I erased the chip (using JFlash), and reflashed any other code, I can't get it to do anything.
Is there any other sort of master reset that I may need to do on this device apart from using Erase Chip in JFlash ? (Actually I tried using another GDB compatible SWD programmer and used the "monitor erase_mass" command, which normally totally erases the nRf51, but it didnt make any difference :-(
I guess I can go back to first principals and perhaps load a program that does virtually nothing except toggle a GPIO pin, and run it in the debugger.
But I was hoping there was perhaps something else I could try, before I have to configure GDB etc in Eclipse etc, as I don't have it configured to do on chip debugging at the moment.
Thanks
Edit.
I have since found the module is actually a Wireless-tag.com WGT51822-S2, and the problem is because it does not have a 32kHz crystal So I have changed the title as this is more accurate
