I shall go for AWOL's suggestion of 24cm for a quarter wavelength for my 315MHz devices.Any ideas why it works fine without any antennas?@ajofscott: how do I set my address? I can't see anything in code and my module do not have a coil to change the frequency like my other 433MHZ devices do. Hopefully it shouldn't be a problem, as I'm sending a string to the boiler which has to be understood.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16