O-1PST DIY kit (new)
- All wiring confirmed correct (PM1 = PM sensor, PM2 = CO2 sensor, both fully seated)
- Using the exact same power adapter + cable that works perfectly on my indoor AirGradient
- WiFi signal strong at the location (same spot where indoor unit works fine)
- Indoor unit on same 2.4 GHz network works perfectly
- After multiple full erase + flash + re-setup: blue LED does exactly 4 blinks ×3, then 5 blinks ×3, then completely off
- Faint internal CO2 LED is blinking (board + CO2 sensor alive)
- App shows “seen once” with new timestamp each power cycle
- Pattern repeats identically every time
All common causes (power, wiring, signal, network) ruled out. Any ideas??
