Inter-Badge Communication

Here is a demo of using ESPNOW to achieve badge-to-badge communication.

~~As noted in the repo, currently this only works when the sender knows the receiver's MAC address. Broadcast functionality, which does not require the MAC address of a recipient, does not seem to work as it shows in the espnow docs.~~

As of Tildagon OS 1.9.0, broadcast functionality works, so you can send messages to all badges in 'receiving' mode without needing to know their MAC addresses. Use the broadcast MAC address b'\xff\xff\xff\xff\xff\xff' to send messages to all badges.

MAC address can be found through like so:

import network
import ubinascii

wlan_sta = network.WLAN(network.STA_IF)
wlan_sta.active(True)

wlan_mac = wlan_sta.config("mac")
mac_str = ubinascii.hexlify(wlan_mac).decode()
print(f"MAC address: {mac_str}")

See the ESPNOW MicroPython docs for more information and inspiration.