2.4ghz wifi required for esp32

ChirpStack (v4) Setup and configuration
1

My rpi3 chirp stack access point is using 5ghz wifi.

I. want esp32 chips to be able to connect to the pi, but they can only use 2.4ghz

how do also setup 2.4ghz wifi on a full chirp stack please?

2

Scary moments and clutching the OpenWRT config pages firmly…

I changed the /etc/config/wireless file to have different wifi-device options:

config wifi-device 'radio0'
	option type 'mac80211'
	option path 'platform/soc/3f300000.mmcnr/mmc_host/mmc1/mmc1:0001/mmc1:0001:1'
	option channel '4'
	option band '2g'
	option cell_density '0'

and it worked!

PLEASE note, this was for RPi 3b and the file also contains the original config wifi-iface 'default_radio0' section

for ref:
https://openwrt.org/docs/guide-user/network/wifi/basic