Hi,

I have a ESP32 Hardware (WROVER-E) with a LAN8720 Ethernet Phy.

I want to send and receive data over udp multicast - and i just use the WifiUdp class for that purpose.

I get it running with a basic programm and the multicast packets are comming in fine.


The real use case is a different one ...

I have a question regarding the Auo-program mechanism.

I have ONE specific computer where the timing of the DTR and RTS signals are in a way entering bootloader does not work.

The esptool does following sequence:

pull RTS low ( => put ESP into reset)
sleep
pull DTR low ( => should pull GPIO0 to ...

Yes, I could switch to a task - that is plan B but requires some refactoring.

I think I can live with the limitations of rmt_tx_start (like, the limited number of rmt items).. and I really want to solve that puzzle

I mean, that tx end callback - it should work shouldn't it ?

no one ?

whatever I try, its not working with rmt_tx_start.

I could really use some advice

H ithere,

I need to drive some Serial adressable RGB-LEDs (WS2813C). I use the RMT unit for that to do it as fast as possible.

Due to the histry of my project it is for both RP2040 and ESP, and I want to keep it as similar as possible.

Currently, I use a timer interrupt for setting my LEDs, so ...

Hi,

I would like to control my lan8720 phy regarding link speed (10 / 100 mbit) to save some power.
There ist this method in the mac struct to do that

https://docs.espressif.com/projects/esp-idf/en/release-v4.4/esp32/api-reference/network/esp_eth.html#_CPPv4N13esp_eth_mac_s9set_speedE

but - how ...

thanks for your reply.
As the RX_ER Signal is not needed, I have one GPIO free now, so i choose the option to use an external 50MHz osciallator and enable them with a GPIO.
To have a stable "1" at GPIO0 while startup, there is a 10k pullup (the osciallator can push pull 4mA so this 10k is no problem ...

I wanted to add, I use the Pico-V3-02 + LAN8720 because it is a VERY compact solution and I have not much board space.

Thats it how it should look like when layouted in final form factor..

Hi,

I made a custom board with the PICO-V3-02 that should have wired Ethernet. I choose Lan8720 for that purpose.
While I'm new into using ESP32 I choose to make a evboard with a lot Jumpers so I can learn first and more easily try things out.

I already learned about some basic mistakes I made in ...

I finally got it running.
I turned out that the missing connection on Pin 19, VDD3P3_RTC was the reason.

I had some other issues with the "one click download" but I could fix that also.

Thank you all for your help! No I can start getting Ethernet working...