The IWIN AT Command firmware can be uploaded to your module or evaluation board using the following procedure. 
OTA requires that your module has external flash attached to the module for upgrades. See how to OTA updates for more information. Some eS-WiFi modules have flash on boar for OTA.
The latest firmware available for the ISM43362-M3G-L44 with UART or SPI host interface.
- ISM43362-M3G-L44-C6.2.1.11 UART Firmware (unzip for bin file)
- ISM43362-M3G-L44-SPI-C6.2.1.11 SPI Firmware (unzip for bin file)
- STM32L4 Discovery kit IoT node (B-L475E-IOT01A) ISM43362-M3G-L44-SPI-C3.5.2.5.STM SPI Firmware (unzip for bin file)
- New STM32L4 Discovery kit IoT node (B-L475E-IOT01A) ISM43362-M3G-L44-SPI-C3.5.2.7.STM SPI Firmware (unzip for bin file)
Find the latest firmware available here for the ISM43340-M4G-L44-10 UART or SPI host interface:
- ISM43340-M4G-L44-C6.2.1.11 UART Firmware (unzip for bin file)
- ISM43340-M4G-L44-SPI-C6.2.1.11 SPI Firmware (unzip for bin file )
- Discovery kit IoT node (B-L475E-IOT01A) ISM43340-M4G-L44-SPI-C3.5.2.6-Discovery SPI Firmware (unzip for bin file)
The latest firmware available for the ISM4343-WBM-L54 & L151 with UART or SPI host interface.
- ISM4343-WBM-L54-C6.2.1.11 UART Firmware (unzip for bin file)
- ISM4343-WBM-L54-SPI-C6.2.1.11 SPI Firmware (unzip for bin file)
6.2.1.11 readme Updates.txt
6.2.1.x SPI Errata for ISM43340 and ISM4343 modules.txt
3.5.2.5 IWIN Command Updates.txt
Archive versions can be found on the link below:
Archive ISM43340-M4G-Lxx UART or SPI host interface:
- ISM43362-M3G-L44-C3.5.2.5 UART Firmware (unzip for bin file)
- ISM43362-M3G-L44-SPI-C3.5.2.5 SPI Firmware (unzip for bin file)
Archive ISM43340-M4G-Lxx UART or SPI host interface:
- ISM4334x-M4G-L44-C3.5.2.5 UART Firmware (unzip for bin file)
- ISM4334x-M4G-L44-SPI-C3.5.2.5 SPI Firmware (unzip for bin file )
3.5.2.5 readme Updates.txt
3.5.2.5 IWIN Command Updates.txt
Archive versions can be found on the link below: