Does ESP-HOSTED-MCU support ESPNOW?

[DreadNaught]

I've been working with the ESP32 P4 Function EV dev kit and LOVE the fast display updates with the MIPI DSI LCD.
This is going to be perfect for a automotive digital dash, since the P4 supports 3 TWAI controllers.

I would like to add wireless sensors for oil pressure, brake line pressure, etc using ESPNOW and display them on the MIPI DSI LCD.

Soooo, does the esp-hosted-mcu support ESPNOW?
The examples show WIFI and Bluetooth.

-OR- since ESPNOW uses wifi, do I just need to add those functions to the ESP32 P4 wifi examples?

Thanks in advance for any clarity you can provide!

[AloePacci]

Short answer. ESPNOW works.

ESPNOW is an special configuration for WiFi, using standard 802.11
At the end of it you achieve a longer range when you do not need much data to be transmitted (smaller package size) creating something alike a WSN.

You will probably need to add this configuration to the code as if programing ESP-IDF.

However. ESP-NOW sometimes presents loose of packets, so you may miss some data of sensors in a QOS 0 connection.

To be honest, if i were working on a car. I would go for CAN. Something wired on a bus. Where data is not lost and you can stablish priorities and messages to know if something is work¡ing as expected.

So yeah, you can achieve ESP-NOW in your system. But doing so, your sensor may experience heavy problems that you may not notice in time.

[DreadNaught]

Thank you for this detailed post.

I agree that CAN bus /TWAI is a more solid/stable solution, but by using bluetooth/wifi/ESPNOW wires don't need to be routed from the engine bay, through the firewall, to the inside of the car. On newer cars, this is not a quick or easy job and if not done correctly, water can leak in.

I've been testing a bluetooth (nimBLE) oil pressure sensor for the last 3 years, and it has worked perfectly.
BUT the "many to one" aspect of the ESPNOW has my interest.

Over the next few days, I'll continue to work on this.