Radio transmitter
Wi.M868T-R™ Radiotronix

The Wi.M868T-R™ 868-870MHz transmitter module is a microcontroller-less version of our popular Wi.232DTS-R™ and Wi.232FHSS-25-R™ modules. It offers the same excellent RF performance, yet allows the design engineer to control the radio at the physical level using any microcontroller.

The module is footprint compatible with the many of the Wi.232 family of radios, including the 900MHz Wi.232DTS-R, Wi.232FHSS-25-R, Wi.M900X-R, and the European 868MHz Wi.232EUR-R, and Wi.M868X-R. The Wi.M868T-R supports wide-band mode, where the channel width is 600kHz and also a narrow-band mode where the channel width is 200kHz.The module is configured via a simple SPI style serial interface. Data is transmitted and received using a separate digital serial interface that includes pre-amble and start-of-packet detection.

Maximum transmit power is +15dBm. Maximum receive sensitivity is -112dBm. The transmitter draws 62mA typical at +15dBm. The module has 32 wideband and 84 narrowband channels available.

A footprint compatible module companion version is available in 902-928 MHz for the North American market Wi.M900T-R.

A typical circuit consists of a low-cost microcontroller, a power source, a Wi.M868T-R module, and an antenna. The RK-Wi.M868X development kit is available to support evaluation of this product with separate Wi.M868X-EVM-R evaluation modules for additional wireless node development. The Wi.M868X-R is very similar to the Wi.M868T-R except the Wi.M868T-R is configured as a uni-directional transmitter only device where the Wi.M868X-R is a bi-directional transceiver module. For production, order the Wi.M868T-R.