These features required.
1. TLS 1.2/SSL support (Security)
2.509 certification support (Security)
3.MQTT (Communication)
4.Azure compatibility (Cloud)
5. FOTA upgrade support
6. Internal RTC
7. 4MB Flash
8. 3 USARTS
9. 5 GPIOS
10. 1 SPI
11. 1 I2C
These features required.
1. TLS 1.2/SSL support (Security)
2.509 certification support (Security)
3.MQTT (Communication)
4.Azure compatibility (Cloud)
5. FOTA upgrade support
6. Internal RTC
7. 4MB Flash
8. 3 USARTS
9. 5 GPIOS
10. 1 SPI
11. 1 I2C