Good news, I just assembled the revision 4 EXT module yesterday.
I’m still missing the GL850G USB hub tough, and the PWM fan controller and USB to UART I didn’t populate. Aside from that, it works very nicely!
Here’s the i2cdetect, all devices show up:
$ sudo i2cdetect -y -a 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- <<-- 0x20: MCP23008 Port Expander
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- 68 -- -- -- -- -- -- -- <<-- 0x68: DS1307 RTC
70: -- -- -- -- -- -- 76 -- -- -- -- -- -- -- -- -- <<-- 0x76: BME280 via breakout cartridge
Regarding the edge connector position, @yatli hit the nail on its head, it fits perfectly with the parts I designed early on.
The only cartridge I can test right now is only the breakout adapter,
but that works as expected, added a BME280 to the I2C bus and it reads out as expected.
Parts for the thermal printer and camera module will arrive next week, then I’ll give an update on that when I got to testing.
Tough the mechanical aspect for the printer is sorted out now, just needed to adjust the model slightly.
Lastly, the LAN/RS232 combo module, routing is 87% done and I expect it to be finished in two to three months, giving myself a little leeway here because this one is packed.
