Not so good wifi signal strength

sheepDog

Hello,

I bought two "M5Stack Core2 ESP32 IoT Development Kit for AWS IoT EduKit" and two "M5Stack Core2 ESP32 IoT Development Kit".

Today I noticed that the AWS version did not receive the wifi as well. Both AWS version didn't work at my desk, but both non-AWS worked fine.

I got the errors at startup:

Wifi missing. Status=6
I (7634) wifi:new:<11,0>, old:<1,0>, ap:<255,255>, sta:<11,0>, prof:1
I (7634) wifi:state: init -> auth (b0)
Wifi missing. Status=6
I (8634) wifi:state: auth -> init (200)
I (8644) wifi:new:<11,0>, old:<11,0>, ap:<255,255>, sta:<11,0>, prof:1
I (8764) wifi:new:<11,0>, old:<11,0>, ap:<255,255>, sta:<11,0>, prof:1
I (8764) wifi:state: init -> auth (b0)
Wifi missing. Status=6
I (9764) wifi:state: auth -> init (200)
I (9764) wifi:new:<11,0>, old:<11,0>, ap:<255,255>, sta:<11,0>, prof:1
I (9894) wifi:new:<11,0>, old:<11,0>, ap:<255,255>, sta:<11,0>, prof:1
I (9894) wifi:state: init -> auth (b0)
....

If I go two meters nearer to the AP both AWS worked fine, too.

Have anyone an idea what I can you do (without that I go closer to the AP) ?

m5stack

@sheepdog said in Not so good wifi signal strength:

You can try. . . Change the transmit power of your AP

sheepDog

@m5stack thank you for your answer.

This solution is just as trival as to go closer to the router. Unfortunately I cann't go closer and I cann't increase the transmit power. Can I connect an antenne to the "M5Stack Core2 ESP32 IoT Development Kit for AWS IoT EduKit"?

m5stack

@sheepdog It will be more troublesome, you need to disassemble the original antenna, and then solder the new one

felmue

Hello @sheepDog

to me it looks like both, the regular M5Core2 and the AWS version, are using identical hardware / same board revision - at least the ones I have do.

The difference is in the M5GO2 bottom: the AWS M5GO2 bottom adds the secure element.

That said, have you tried the AWS version w/o the AWS M5GO2 bottom attached?

Thanks
Felix

sheepDog

Hello @felmue,

you are right, the top of M5Core2 and the AWS are identical. But the bottom is the challenge: The ground of the AWS shields the antenna. -> Yes, I tried the AWS version without the AWS M5GO2 bottom attached.

I tried this too:

Insert a prototyp board between AWS-top and AWS-bottom. It improves the field strength a little bit.
Insert a small silver wire in the prototyp board at the antenna of the AWS-top. So I almost reach the regular field strength.