The firmware version 3.4.5 is intended for all MTR-H6/H5/EV3/C2/G3 models and this README will step you through the upgrade process. Flash 3.4.5 before upgrading to the latest version. If firmware upgrade indicates it failed, then DO NOT power cycle, power off or reboot! Try the firmware upgrade again. If it fails again, then keep trying or possibly retry with an older version, but DO NOT power cycle, power off or reboot!

The MTR product MUST be at version 3.4.5 before loading 3.7.3. The firmware version 3.7.3 is intended for all MTR-C2/EV3/G3/H5/H6 models. See Release Notes for further details, full release notes and upgrade procedure information. If firmware upgrade indicates it failed, then DO NOT power cycle, power off or reboot! Try the firmware upgrade again. If it fails again, then keep trying or possibly retry with an older version, but DO NOT power cycle, power off or reboot!

H5 Radio firmware for MTR-H5 models. 

The MTR product MUST be at version 3.4.5 before loading 5.0.0. The firmware version 5.0.0 is intended for all MTR-H5/H6 models. See Release Notes for further details, full release notes and upgrade procedure information. If firmware upgrade indicates it failed, then DO NOT power cycle, power off or reboot! Try the firmware upgrade again. If it fails again, then keep trying or possibly retry with an older version, but DO NOT power cycle, power off or reboot!

This firmware is signed with a Private/Public key pair. The MTR product MUST be at version 3.4.5 before loading 5.0.0. The firmware version 5.0.0 is intended for all MTR-H5/H6 models. See Release Notes for further details, full release notes and upgrade procedure information. If firmware upgrade indicates it failed, then DO NOT power cycle, power off or reboot! Try the firmware upgrade again. If it fails again, then keep trying or possibly retry with an older version, but DO NOT power cycle, power off or reboot!

This firmware is signed with a Private/Public key pair. The MTR product MUST be at version 3.4.5 before loading 5.2.1. The firmware version 5.2.1 is intended for all MTR-H5/H6 models. See Release Notes for further details, full release notes and upgrade procedure information. If firmware upgrade indicates it failed, then DO NOT power cycle, power off or reboot! Try the firmware upgrade again. If it fails again, then keep trying or possibly retry with an older version, but DO NOT power cycle, power off or reboot!