I want to use the AGT as a Peripheral to another MC. Since The AGT can only be used as Controller not a Peripheral with I²C and SPI, I looked at the Serial Communication.
The RX0/TX0 connections can be used for communication with another MC when the USB is not connected. The CH340E will be active with or without a connected USB cable. That means, the TXO/RXI outputs of the CH340E are always connected to the RX0/TX0 breakout connections and generate an idol signal. Can I ignore this idol signal for my MC to AGT serial communication? Or do I need to cut the CH340E Module of the communication line, e.g. with a switch so the MC to AGT communication works without disruptions?
Are there maybe other easy ways to use the AGT as a Peripheral for another MC?
If you do want to use the AGT RX0 / TX0 signals then, yes, you will need to isolate the CH340E TXO Pin 8. It will be trying to hold ARTEMIS_RX0 high and will ‘fight’ anything else you connect to the bus. With care, you may be able to isolate the IC leg itself? You do not need to isolate CH340E RXI Pin 9. It is an input and can be ignored.
I need for my project the Satellite and GPS connection. I like the AGT because it only needs one antenna for both systems and is small compared with other solutions. Furthermore, I also have not a lot of space to put all my electronics into for my project. Do you have another idea how I can connect the AGT with another MC and using as little space as possible?
