BLE between 26Mhz and 40Mhz devices

jchainho
Posts: 2
Joined: Wed Aug 17, 2022 8:56 am

BLE between 26Mhz and 40Mhz devices

Postby jchainho » Fri Aug 19, 2022 10:22 am

Hi ESP32 Community,

I've been working on a LPWAN Wi-Fi module using the ESP32-D2WD (soon moving to the U4WDH).
The ESP32 is clocked at 26Mhz (same TCXO for both ESP32 and LPWAN) and Wi-Fi is working fine.
I have a problem with BLE connectivity though. From our module to our module, no problem. No issues from a WROOM test device (at 40MHz) to another either. However, advertising to and from a WROOM to our module, most messages are not received, only a handful.

IDF version: 4.4.2
BLE stack: esp-nimble-cpp 1.4.0

Am I am doing something wrong?

Many thanks!

jchainho
Posts: 2
Joined: Wed Aug 17, 2022 8:56 am

Re: BLE between 26Mhz and 40Mhz devices

Postby jchainho » Tue Aug 23, 2022 5:00 pm

Would it make sense to try to tweak the PLL settings?

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