RF-SM-1277B2 is a Sub-1G module working under the 431 MHz ~ 537 MHz frequency. The CC1312R module can be used in the sensoring market. Choose RF-SM-1277B2 to enhance the transmission distance and ease the design of the end products.
RF-SM-1277B1 is a Sub-1GHz module working under the 779 MHz ~ 930 MHz frequency, especially recognized for 868 MHz 915 MHz transmitter and transceiver. It is widely used in high requireents with the long range transmission and low power consumption. RF-SM-1277B1 will be a good choice to be inserted in your end devices.