Updated 2/14/2019
This is how to update firmware for 4in1 modules. I own 2 types at this time.
Since there are several modules and a few ways to update I will try to cover what I know and I hope you will help. My goal is to try to add whatever helps to have a step by step approach to do any type.
For reference I followed Pascal Langer's process. HERE:
https://github.com/pascallanger/DIY-...iling_STM32.md
T-12 4-in-1 V 1.2
Since I was first successful with this one I will start here.
The version should be determined first.
AFAIK there are currently 2 versions of the PC board. V1.1 and V1.2
I had to open the case to determine my PCB version.
If you don't have to remove the PCB coax connector then don't. These types of connectors can give out after a few disconnects and re-connects.
The V1.2 already has an active mini USB port and it can be updated via that port without any jumpers or soldering.
The only tool I used was a miniUSB to my windows 10 PC
Plugging into this port activates the Boot 0 and makes it ready to update.
My 4in1 showed up in my device manager as Silicon Labs CP210x USB to UART Bridge (Com6)
I was able to upload the new firmware with the module out of the TX
I started with the Pascal's
Preparation step and followed every step
Install arduino ide, upgrade Java, follow the downloaded the multiprotocol source by clicking on the HERE in step i.........
When I got to the upload step this is whatTools looked like just before UPLOAD.
Upload finished with a
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