Thanks for asking. Would also be useful to be able to sniff for Bluetooth.

While I understand there are certification issues as far as radio transmission is concerned, I don't see why the radio functions have to be so undocumented on the reception side.

I have been able to receive UDP packets in promiscuous AP mode and then send them out again with esp_wifi_80211_tx() function. It is fairly easy if you limit it to a particular protocol. Probably it would be a lot of work if you wanted it to do more than that. And sending seems to be limited to abou...

I understand that 802.11 already has forward error correction. However, when the error correction fails for one or more blocks within a packet, the entire packet is discarded. Due to the highly repetitive nature of the data we are sending, it would be useful to receive the discarded packets. The rem...

For a commercial application we need 802.11 error frame reception in promiscuous mode. Purpose is to implement Reed-Solomon-Code for error correction of broadcast packets. Is it possible?

I think you could just use the LWIP RAW API to forward the packets back and forth between ethernet and wifi interfaces. Just filter out the packets you don't need. You might need to change the IP address in the packet buffer as well. Shouldn't be too difficult once you figure out how to use the API.

Answering my own question, in fact the esp_wifi_80211_tx function does automatically calculate FCS. My UDP packets were getting lost because I didn't calculate the IP header checksum correctly.

For our project we're using esp_wifi_80211_tx and promiscuous mode together. Basically we implement our own custom protocol. We don't want the unnecessary and redundant overhead of the Station and AP modes because we handle all the wifi packets in our own callbacks. But if we try using esp_wifi_8021...

Maybe somebody can answer as to whether esp_wifi_80211_tx() generates the FCS or not. Actually I am having a problem with the FCS specifically. I use the ESP32 sniffer to capture frames and the FCS captured does not correspond to CRC of the payload. Therefore I don't know how to generate the FCS for...

Hi, I wonder if anyone can post a complete example of sending an 802.11 data frame using the function esp_wifi_80211_tx . Although it appears I am successfully sending something, my wireshark captures don't indicate any data. Maybe there is a wrong checksum or something like that. Although there are...

According to the ESP32 datasheet: • Antenna diversity ESP32 supports antenna diversity with an external RF switch. One or more GPIOs control the RF switch and selects the best antenna to minimize the effects of channel fading. However I can find no corresponding information in the technical referenc...