Sending Assisted GNSS (A-GNSS) to Bangle 2 GPS (AT6558)

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Mark_M
I have two CASIC documents v3.6 and v4.2. Many CASIC commands do not work.
For example simple command - set message MON-VER 0x0A,0x04 to rate 0xFFFF to get software version
```
Serial2.write(new Uint8Array([186, 206, 4, 0, 6, 1, 10, 4, 255, 255, 14, 4, 5, 1]).buffer);
```
always returns NACK
If I call it as "poll"
```
new Uint8Array([186, 206, 0, 0, 10, 4, 0, 0, 10, 4]).buffer
```
it also returns NACK

If such a simple command does not work, it looks very suspicious to me.
Why I suggested to ask docs and new firmware from SMA, because you have purchased their product. When SMA purchased AT6558 chips from Hangzhou ZhongKe they probably got all current docs, binaries and support from them. They, as a big customer, also can request firmware updates.
Also their support page looks more customer friendly. https://smawatch.com/Support
I've looked at https://www.icofchina.com/contact/ support is only by phone and all is in Chinese.

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