The "SMA" version (E07-M1101D-SMA) includes an SMA connector for external antennas, which significantly improves range compared to the spring antenna version. Power Stability:
Most users recommend the SmartRC-CC1101-Driver-Lib on GitHub. It is highly optimized for these Ebyte modules and handles the nuances of the CC1101 registers better than generic SPI libraries. Wrapping Up e07-m1101d pinout