Hi Shiva:
Glad to hear you specialize in embedded system development. We deliver the transparent RF module based on Si4432 and Si4463 at sub-GHz 315MHz,433MHz,868MHz and 915MHz. It need only simply code when integrated with STM32. Compared to other solution, we have steady performance at full power. We specialize in this field for several years with good performance, pretty competitive price and good services.
Should you have any questions. Please do not hesitate to contact me.
BR
Forbe
AppconWireless technologies co.,LTD