Hallo Versuche gerade zwei RFM12 zu einer Unterhaltung zu bewegen. Im HopeRF Datenblatt finde ich für RX und TX Betrieb zwei verschiedene Gleichungen für das zu übertragende Bitmuster. Verstehe ich das Richtig ? In den BeispielCodes ist immer nur eine Berechnung zu finden. Die Passage aus dem Datenblatt: The actual bit rate in transmit mode and the expected bit rate of the received data stream in receive mode is determined by the 7-bit parameter R (bits r6 to r0) and bit cs. BR = 10000 29 (R+1) / (1+cs*7) [kbps] In the receiver set R according to the next function: R= (10000 29 (1+cs*7) / BR) – 1, where BR is the expected bit rate in kbps. Apart from setting custom values, the standard bit rates from 600 bps to 115.2 kbps can be approximated with small error. Data rate accuracy requirements: Clock recovery in slow mode: ΔBR / BR < 1 / (29*N ) Clock recovery in fast mode: ΔBR / BR < 3 / (29*N ) bit BR is the bit rate set in the receiver and ΔBR is the bit rate difference between the transmitter and the receiver. N bit is the maximal number of consecutive ones or zeros in the data stream. It is recommended for long data packets to include enough 1/0 and 0/1 transitions, and be careful to use the same division ratio in the receiver and in the transmitter. Grüße Torsten