Hello all,
I'm using a picaxe datalogger based on the datalogger kit in an electric race car for logging motor temperature and battery current draw. The unit is self contained with its own power supply.
We'd like to add car-to-pit telemetry so I've assembled two of the Pixaxe connect boards. I could just connect the current and temperature sensors to the Connect board and transmit the data directly back to the pits. However, some of the circuits we run at are too big for an XBee (or XBee pro's) range and so some data would be lost over the far side of the circuit. We also have two cars with their own dataloggers (identical) and I'd like to be able to move the Connect 'sender' unit from car to car as required.
Can I just connect a serial link between the two units? - digital in from one into an out on the other and visa versa - then use serin/serout commands to allow the Connect board to request data from the logger when in range of the pits. The two units are self contained with their own power supplies (3 x AA batteries) - will connecting them together with a common ground like this cause a problem? Apologies if this is a really daft question - I'm more programmer than electronics engineer!!
Geoff
I'm using a picaxe datalogger based on the datalogger kit in an electric race car for logging motor temperature and battery current draw. The unit is self contained with its own power supply.
We'd like to add car-to-pit telemetry so I've assembled two of the Pixaxe connect boards. I could just connect the current and temperature sensors to the Connect board and transmit the data directly back to the pits. However, some of the circuits we run at are too big for an XBee (or XBee pro's) range and so some data would be lost over the far side of the circuit. We also have two cars with their own dataloggers (identical) and I'd like to be able to move the Connect 'sender' unit from car to car as required.
Can I just connect a serial link between the two units? - digital in from one into an out on the other and visa versa - then use serin/serout commands to allow the Connect board to request data from the logger when in range of the pits. The two units are self contained with their own power supplies (3 x AA batteries) - will connecting them together with a common ground like this cause a problem? Apologies if this is a really daft question - I'm more programmer than electronics engineer!!
Geoff