I bought a (very) cheap 433MHz transmitter/receiver duo from ebay. My goal is to connect a PIC controller with the raspberry wireless through these two circuits. I tested it with simple RS232 and that would work if I put them close together. However I need some distance (hence wireless
The setup is that the PIC controller transmits some data, only transmit, there is no feedback from the Pi that it received it correctly, The Pi should receive this data. The data is sent every 5 minutes. (a telegram is the phrase). Could be some 300-500Characters, but I could condense that to maybe 100.
Now I reckon some CRC or other protocol is normally used for this kind of one-way transmission. And I did search the net and this forum, but did not find a satisfying solution yet. Part of it is when I search for 433MHz I get a huge response......
The Xmitter sends on/off keying. It is very prone to noise and other interferences. So I need a protocol that is robust. I can send it several times if required.
Could someone point me to a website or protocol that would satisfy my needs? Surely someone has had the same issue?
Found something about Manchester coding, but that is not clear (i.e. to me it is not).
Help is appreciated.