Wi-Fi 1 / Wi-Fi 2 / Access Point (IDFGH-13504)

[diplfranzhoepfinger]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Wi-Fi 1 / Wi-Fi 2 / Access Point

devices from Shelly can connect to 2 Wifi APs

so it is like a dual-Station + AP

how is this possible ?

i know shelly runs Mongoose OS https://mongoose-os.com/ but is this the Reason ?

it seems this runs still on top of ESP-IDF ?

[MaxwellAlan]

Hi @diplfranzhoepfinger

Sorry, regarding the issue you mentioned, I might not have fully grasped the point you are concerned about. If possible, could you please provide a specific example for reference?

As for the sta1+sta2+softap mode, which can be supported when h/w have 3 interface( which may include the hw FIFO for pkt tx & rx, h/w MAC register). And also there are some limitations, such as if only have one RF, which means the STA1 STA2 and softap should work in the same channel etc.

Thanks.

[diplfranzhoepfinger]

my Question was how can shelly do this ? they have no special Chips,
just ESP32 and ESP32C3,
and they make simultaneous sta1+sta2+softap mode

[igrr]

https://community.shelly.cloud/topic/1246-purpose-of-wi-fi-2-in-shelly-plug-setup-app/

WiFi2 is a fallback for when WiFi 1 cannot be reached. As far as I know, Shelly device will only switch to WiFi2 if WiFi1 is completely unavailable. So they won't hop networks based on signal strength.

So it's not a simultaneous connection to two APs. You can implement the same fallback logic using IDF APIs.

[diplfranzhoepfinger]

ahhhhhhhhhhhhh. pure Fallback.
now it makes sense.