I've tested with the latest firmware and the consumption current is less than 10 uA (7.7 uA after a few minutes increase to about 8.9 uA) with supply voltage 3.3v. It seems that the current consumption can be reduced more by using the standby mode instead of stop mode.

@leopold thank you Leopold, the issue is solved. I add the startup code from "iar" folder in "cmsis" folder and the problem is solved.
thank you for reply.

@kennetgo Thanks for supporting our RAK811 module.Recently started preparing to upgrade to LoraWAN (1.1) for RAK811.Please feel free to consult us or follow us on github for RAK811.

@ssarda Could you please send the screenshot of detailed operation steps together with the firmware? I will test your firmware and operation with your steps, and then help you analyze the reasons.

Hi @carlos-soria
Sure, I'm using the latest firmware (firmware V2.0.3.0) from RAK github.
below is the link of firmware:
https://github.com/RAKWireless/RAK811/tree/master/AT Firmware

@jongjupark SoftwareSerial Is a arduino library , have nothing to do with RAK811 module . Try to download and install from github

@xc.c did you planned to publish a patched firmware ?

@fomi, hello!
I deployed this project on my Raspberry pi3: https://github.com/RAKWireless/RAK831-LoRaGateway-RPi. And next to it I launched two WisNode RAK811 with P2P project PINGPONG: http://docs.rakwireless.com/en/LoRa/WisNode/Software Development/RAK811 OpenMCU Developing User ManualV1.0.pdf.
Data exchange between the RAK811 takes place about 1 time per second, but the gateway captures packets much less frequently. Tell me what could be the reason for this situation? 2 RAK811 and RAK831 are close to each other ... RAK811 receive packages with RSSI 4-7dbi , and RAK831 get packages with RSSI -20dbi and less 0_1544534090143_pktlog_AA555A0000000101_20181211T075930Z.csv ... how can that be?

Does the firmware 2.0.2.2 support class C operation?

Any official answer?