Simu ya Mteja
USSD Inatumika
IEC 62055-41
*150*55#
SolarStart Huduma
TECNO · T352 CLASS
Walkthrough: The Off-Grid Offline PAYG Journey
How a rural farmer with zero smartphone access or mobile money history buys electricity and restores power in under 60 seconds.
1
Low Balance / Battery Warning Alert
Smart meter detects balance < 1.0 kWh or Edge EMS predicts storm; sends instant proactive SMS without beeping.
2
Dial Self-Service USSD (*150*55#) or M-Pesa (*334#)
User dials USSD on feature phone (zero data needed) to inspect balance or initiate Paybill token purchase.
3
Receive 20-Digit Cryptographic STS Token
Central server / local agent gateway generates standard IEC 62055-41 token delivered via SMS. Same 20-digit format as TANESCO LUKU — no new behavior to teach.
4
Offline Keypad Entry on Smart Meter
User types token on physical wall meter. Meter validates cryptographic hash locally with no cellular link!
SMS Message Center (Sender: SOLARSTART)
SOLARSTART ALERT
10:45 AM
Habari Charles! Mita #10024892: Salio lako limebaki 0.8 kWh (Saa ~10). Betri iko 14%. Piga *150*55# kuongeza salio na kuepuka kukatiwa umeme.
Scenario Injection (Judges Showcase)
Offline Smart Meter UIU
IEC 62055-41
Meter: #10024892
SOLARSTART UIU-300
KIGOMA PILOT
STS NORMAL
1:25 PM
0.80 kWh
BATT: 14%
LOAD: 45W
RELAY: CLOSED
POWER
LOW CRED
STS VALID
RELAY ON
Keys: 1–4 jump to steps · Space = next step · P = presenter · G = guided demo
DUAL-CIRCUIT INVERTER STATUS
ARM CORTEX EMS
DC
Critical Circuit (Lighting & Clinic Fridge)
ACTIVE (45W)
AC
Heavy Circuit (Grain Mill / Welding)
PAUSED (SAVING)