H501SS Firmware Updates 09-2018
H501SS firmware files
FC-1.1.46 (firmware for flight control board)
RX-2.1.50 (firmware for H501SS receiving board only)
TX-1.1.17 H906A/FPV1 (Advanced Transmitter)
TX-4.2.36 H901A/FPV2 (Standard Transmitter)
CHANGE LOG:
1. Added compatibility to work with new compass.
2. Improved functionality when connected to Hubsan watch model HT006.
3. Optimize the stability of the GPS.
4. Improved the distance value display issues where the value would jump when connected to the transmitter.
5. Lowered the 2.4 signal to avoid interference to the 5.8 signal.
6. Improved Camera quality if installed with camera firmware camera version H501S-S C-C.
H501SS firmware installation
If your H501SS came stock with firmware version V2.1.16 and FC-1.1.29 then try using FC Tool V3 to upgrade the FC and use RX & TX Tool V2 to upgradel the RX and TX.
If your H501SS came stock with firmware version V2.1.16 and FC-1.1.31 or later firmware versions then try using H501A FC & RX Tool V1 to upgrade the FC and RX. Use the RX & TX Tool V2 to upgrade the TX.
When upgrading your new firmware please check carefully that you are using the right firmware for FC, RX and TX. Check the versions of firmware carefully to make sure you are installing S firmware to the H501S and SS firmware to the H501SS.
Check and double check the firmware file name and type on the tools interface before clicking install!

If you get an error message during upgrade using the H501A FC & RX Tool V1 simply clear the error message and click upgrade again. Also: Click Read Version in the install tool to confirm the upgrade of the FC and RX firmware was successfully installed and done correctly.
After every firmware upgrade: Be sure to do the following!
1. Bind
2. Stick Calibration
3. Horizontal Calibration
4. Rotational Calibration
Notes:
Important!!! Do not try to mix the RX firmware between the S and SS! The receiving board for the H501SS and H501S are two completely different receiving boards. The RX firmware will not function if they are mixed. Use the correct firmware stated above for your model.
