This page provides technical setup information for the Andino-UPS. For a general introduction on the product, please refer to Andino-UPS

For the firmware download, please visit our GitHub repository

The default firmware, witch is inital delivered uses 38400 Baud to communicate with the PC

This is what the Firmware do:

  1. Track the Powerdown Signal from the Power-Controller
  2. Read cyclical the Super-Cap voltage
  3. Controls the Power Fail Signal for the Client
  4. Controls the Power Down Relay to shut down / restart the Client
  5. Controlls the LEDs
  6. Communicate via the ttyX or COMx interface with a PC (or simular) see here how to connect

The Firmware is written as a Finite State Machine (FSM) It consits of states witch handles Events witch causes Actions and State transitions.

State Machine Flow

State Machine up-down

State Machine up-down-up again

All commands or messages are sent and received via the UART
All character are ASCII.
Every command has to be terminated by CR or LF. Message ends with CR and LF.

Command Arguments Action Default Example
RESET none Restart the Controller - RESET
INFO none Prints the current settings - INFO
HELP none Prints the current settings - INFO
TRCE 0=no, 1=yes Write Trace informations of the FSM to the UART 0 TRCE 1
REGS none Dumps the internal registers in JSON format - REGS
GOOD 20..98 Sets the Power good level in % 80 GOOD 50
HYST 1..100 Sets the Timer for the Shutdown of the Client 5 HYST 10
DOWN 1..100 Sets the Timer for the Power off Client to Restart 5 DOWN 10

Send the Command REGS\r\n and the device will answer with a JSON Block

"chrg_sts": 0b0001010010100101,
"moni_sts": 0b0000001000000000,
"vc1": 2132,
"vc2": 2617,
"vc3": 2617,
"vc4": 2617,
"vin": 23848,
"vcap": 9985,
"vout": 23799,
"iin": 26,
"ichg": 0,
"temp": 25,
Name Description
chrg_sts Charge Status Register
moni_sts Monitor Status Register
vc1 Voltage CAP1
vc2 Voltage CAP2
vc3 Voltage CAP3
vc4 Voltage CAP1
vin Input Voltage
vcap Total CAP Voltage
vout Output Voltage
iin Input Current in mA
ichg Charge Current in mA
temp Core Temperature in C
index upcounting message counter

For more details please see here

If you enable the Trace "TRCE 1" this will be written: State / Event Value or State -> State transitions

Init / Enter  Val: 0
Init -> Charging
Init / Leave  Val: 0
Charging / Enter  Val: 0
Charging / Up  Val: 10
Charging / Level  Val: 6590
Charging / Level  Val: 6890
Charging / Level  Val: 7180
Charging / Level  Val: 7450
Charging / Level  Val: 7730
Charging / Level  Val: 7930
Charging / Level  Val: 8170
Charging / Level  Val: 8370
Charging / Level  Val: 8580
Charging / Level  Val: 8780
Charging / Level  Val: 9000
Charging / Level  Val: 9180
Charging / Level  Val: 9340
Charging / Level  Val: 9520
Charging -> Charged
Charging / Leave  Val: 0
Charged / Enter  Val: 0
Charged / Level  Val: 9680
Charged / Level  Val: 9870
Charged / Level  Val: 9990
Charged / Level  Val: 9980
Charged / Level  Val: 9990
Charged / Down  Val: 0
Charged -> Down
Charged / Leave  Val: 0
Down / Enter  Val: 0
Down / Level  Val: 9920
Down / Level  Val: 9860
Down / Level  Val: 9820
Down / Up  Val: 10
Down -> Charging
Down / Leave  Val: 0
Charging / Enter  Val: 0
Charging / Level  Val: 9920
Charging -> Charged
Charging / Leave  Val: 0
Charged / Enter  Val: 0
Charged / Level  Val: 9990

To develop or change the Firmware for the Andino UPS from a PC, please follow this steps:

  1. Download the Arduino IDE here
  2. Download the Firmware and save it in an Folder named UPS-V01
  3. Setup the Arduino IDE. (below)
  4. Use the USB-TTL Uart adapter

The Andino UPS allows to program the Atmel Controller from the Raspberry Pi with avrdude or from a PC via a USB Adapter.

here Andino UPS - Arduino settings

Insert the Adapter at the upper side of the Andino UPS (6-pin slot)

Andino UPS - USB Adapter