Quectel EG25-G Delta Radio Firmware Upgrade support - libmts-io implementation

During testing with L4G1 device I discovered some inconsistencies in behaviour between
EG25-G device and EG95 devices (EG95-NA and EG95-E).

EG25-G device that I have on hands does not allow to perform downgrades using delta images.
When there is an attempt to apply a downgrade delta image it behaves as the following:

- radio prints `OK`
- radio prints `+QIND: "FOTA",502`
- radio is not rebooted

While EG95 radios always reboot at least once to apply the firmware image. Even if it is not valid.

Also I noticed that detach from the serial bus may take more than 10 seconds in some rare cases.
Thus we need to wait not a fixed amount of time but until the radio actually detaches from the bus.

This commit attempts to address the findings described above.

1 files changed, 3 insertions, 0 deletions

diff --git a/include/mts/MTS_IO_QuectelRadio.h b/include/mts/MTS_IO_QuectelRadio.h
index 58e3d25..0f24db8 100644
--- a/include/mts/MTS_IO_QuectelRadio.h
+++ b/include/mts/MTS_IO_QuectelRadio.h
@@ -86,6 +86,9 @@ namespace MTS {
                 CODE fumoWaitUpgradeFinished(UpdateCb& stepCb);
                 CODE fumoWaitNewFirmware(UpdateCb& stepCb);
 
+                /// Parse error code in early FUMO URC result received before the first attempt to flash the firmware
+                std::string getFumoEarlyErrorCode(const std::string& sRadioInput);
+
                 /// Get value from container by its index, use default value if not found. Non-template version.
                 const std::string& getByIndex(const std::vector<std::string>& vector, size_t index, const std::string& defaultValue) {
                     if (index >= vector.size()) {