From the schematics, design and document a test cable that connects to the DSUB-25 port, and allows an ME2.0 prototype to be powered from any of the following:
5V USB
2x LiFePO4 rechargable batteries
Solar panel
12V automotive power (car)
24V automotive power (truck)
It should also:
Have connectors for the serial console for debugging/flashing, and the means to enable or disable looping the UART back into the unit to connect the serial console to an internal RFD900/RFD868 radio. A DPDT switch is probably the best option here.
Have 6 switches to allow pulling-down each of the RFD900/868 GPIO lines for radio country identification.
Have a connector that uses three of the RFD900/868 GPIOs to connect to a serial EPROM for sophisticated regulatory domain detection. An example serial EPROM to use would be a 24LC08B from Microchip (US$0.20 per piece):
From the schematics, design and document a test cable that connects to the DSUB-25 port, and allows an ME2.0 prototype to be powered from any of the following:
It should also:
Have connectors for the serial console for debugging/flashing, and the means to enable or disable looping the UART back into the unit to connect the serial console to an internal RFD900/RFD868 radio. A DPDT switch is probably the best option here.
Have 6 switches to allow pulling-down each of the RFD900/868 GPIO lines for radio country identification.
Have a connector that uses three of the RFD900/868 GPIOs to connect to a serial EPROM for sophisticated regulatory domain detection. An example serial EPROM to use would be a 24LC08B from Microchip (US$0.20 per piece):
http://ww1.microchip.com/downloads/en/DeviceDoc/21710K.pdf