This release provides an AT command interface that is 100% backwards compatible with the original Murata Modem firmware in version 1.1.06. Thus, version 1.2.0 of the lora-modem-abz firmware can be used as a drop-in replacement for the original Murata Modem firmware preinstalled on some TypeABZ modules. The benefits of this firmware include and open-source development model and support for the most recent LoRaWAN protocols and features (LoRaWAN 1.0.4/1.1.1).
Starting with this release, the official binaries no longer include support for regions that fall outside the frequency range supported by the TypeABZ module. This includes CN470, CN779, and EU433. These regions can be enabled in custom builds at compile time.
**New features**:
- ADR acknowledgement management ([AT+ADRACK](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atadrack));
- Duty cycle backoff interval support ([AT+BACKOFF](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atbackoff));
- Listen before talk (LBT) management ([AT+RSSITH](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atrssith), [AT+CST](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atcst)) in KR920 and AS923 regions;
- Multicast address and security key management ([AT+MCAST](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atmcast));
- RF channel management ([AT+RFPARAM](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atrfparam));
- [Factory reset pin support](https://github.com/hardwario/lora-modem-abz/issues/76) on PB15/SPI2_MOSI (disabled in the official build, can be enabled at compile time).
_The companion Python management tool has also been updated to include support for the new AT commands. The [new version](https://pypi.org/project/lora-modem-abz/1.2.0/) can manage LoRaWAN multicast addresses and RF channel parameters from the command line and includes support for ADR ack and LBT parameters in its outputs._
**Improvements**:
- Configurable data rate in [AT+JOIN](https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface#atjoin);
- AT$HELP and AT+CLAC are terminated with an `+OK` line for consistency.
**Bug fixes**:
- Fixes a duty cycle [deadlock](https://github.com/hardwario/lora-modem-abz/issues/92) in OTAA Join retransmissions.
**SHA256 checksums**:
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**Full changelog**: https://github.com/hardwario/lora-modem-abz/compare/v1.1.3...v1.2.0