This is the CurrentCost development board. Note the 10 pin programming header –the leftmost pins are at 0V the rightmost at the positive supply voltage. I have attached a wire to the anode of the led.
This is my gas meter –there is a cut out at the bottom right of the display that can accept a reed switch.
[...] approach (latching a pulse and clearing it when the cc board transmits) take a look at the circuit and photos on John’s blog. (9 July [...]