There is no actual planned timeline for SNMP.
The most important things for now: (not a specific order)
- Home Assistant Auto Discovery
- Wifi stability
- Matter/Thread support (IPv6 is already working)
- Power optimization (and support for power controller chips like AXP2101 as used in M5Stack CoreS3)
- User selection of specific network/WiFi mode (incl. WiFi off)
- Add support for "Safeboot" image so you can use "Max" builds on 4MB flash ESP32-variants
- Add support for 802.11ax 'sleep' mode where you can remain connected while in deep sleep.
- Add ESP-Now support
- Improve all plugins supporting Modbus-RTU to use the same non-blocking way of reading registers.
- Fix Captive Portal (during WiFi setup) for ESP32-C3/C6
- Add support for ESP32-C5 (5 GHz WiFi) ESP32-P4 (no WiFi, but quite beefy CPU with lots of GPIO) ESP32-H2 (no WiFi, low power, intended for use in Zigbee mesh)
- Add 802.15.4 support (zigbee)
- Add support for 'locked' pin state during reboot/deep sleep
- Add selection of pull-up/-down strength & "open drain" pin state
- Add hardware filtering of noise on pin state changes
- Add support for persistant storage of variables
And some more things, but these are which come up right now