I have a problem!
I've built a simple RS232 circuit that sniffs the serial data going from a POS terminal to a serial receipt printer.
However, the device i'm attaching to the sniffer is located far away from the POS and printer itself. To avoid running cables, i've tracked down the data TIC devices from Datahunter.com which allows wireless 900MHz transmission parasitically from the RS232 port. Neat.
However, the POS does not use flow control of any sort to send data to the POS printer, therefore the TIC on the recieving end ends up with dropped data.
Is there a chip or simple circuit I can build that will introduce hardware flow control and a small data buffer between the sniffer box and the transmitting TIC, so theat the recieving TIC get's all it's data?
Thanks for any input or help.
Gethin.