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This is a list of i2c Codes utilized by Argon ONE Raspberry Pi Cases

argon-one-i2c-codes's Introduction

Argon-ONE-i2c-Codes

This is a list of i2c Codes utilized by Argon ONE Raspberry Pi Cases.

NOTE: Operating system should have necessary libraries to control the Raspberry Pi GPIO.

How to Send i2c Codes to the Argon ONE MCU

Example: Setting Argon ONE to Mode 2 (Always ON)

Type in the Terminal the code below:

i2cset -y 1 0x01a 0xfe

Device Address：0x1a

Write Command Only one byte(0~255) can be used

1. HEX CODE: 0x01 to 0x64 (0~100)

ACTION: Sets the Fan's Duty Cycle from 0%~100%.

NOTE: FAN only starts turning at 10% power input.

2. HEX CODE: 0x00

ACTION: Turns OFF the FAN.

3. HEX CODE: 0xfd

Set the ARGON ONE to Mode 1：

ACTION: Sets "Default Mode"

Behaviour: You need to PRESS button to Power ON from shutdown or power outage.

4. HEX CODE: 0xfe

Set the ARGON ONE to Mode 2：

ACTION: Sets "Always ON Mode"

Behaviour: Power current will flow directly to Raspberry Pi. NO need to PRESS button to power ON from shutdown or power outage.

5. HEX CODE: 0xff

ACTION: Listens at Serial Port to cut power; Requires Serial Port to be ENABLED.

Behaviour: When ARGON ONE receives 0xff，then ARGON ONE will check UART's voltage. Then, it will cut the power when UART's voltage is low.

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argon-one-i2c-codes's Issues

Fan is not working

I have installed argon1.sh script without any issues. I can send i2c commands either via i2cset or argoneoned.service but fan is not starting at all. Do you possibly have any ideas how I can further investigate the issue?

(Asking) Is there a way that the software can get the fan status?

From... a shell/bash/python(3)????

Anywhere not too complicated?

Thanks.

Argon One V2 minimal difference fan speed value

The Argon One V2 revision 06122021V4.2 fan speed can be set with I2C write commands with value between 0 (off) and 100 (full speed). There is almost no difference in fan speed between values 1 and 100. My first impression that I received a DOA, but connected a scope to check what's wrong.

Write I2C fan speed command:

# Stop service
$ sudo systemctl stop argononed.service 

# Set fan PWM speed on I2C bus 1 device address 0x1a:
# value 0: Fan off
# value 1..99: Fan 20kHz PWM 30%..99% duty cycle
# value 100: Fan full speed
$ i2cset -y 1 0x01a <value>

Reverse engineered schematic

The PWM output pin of U1 microcontroller MT006C6PB (STM8S003F3) pin 13 works correctly:

Fan speed value 1 on gate MOSFET Q2 correct:

Fan speed value 50 on gate MOSFET Q2 correct:

Fan speed value 99 on gate MOSFET Q2 correct:

When measuring on the drain MOSFET Q2, the pin is almost 0V (PWM not working) with all values 1..100, also when replacing the fan with a 470Ohm resistor:

It looks like the MOSFET in saturation and is always turning on the fan.

Is this normal behavior that there is almost no difference in fan speed, or is my new Argon One V2 broken? For example broken MOSFET 2302B Q2 controlling the fan?

What about the serial port - needs an additional cable for connection, right?

Last point on -> https://github.com/Argon40Tech/Argon-ONE-i2c-Codes

How is that? Thx for feedback.

I2C address conflict

Some audio interfaces use the I2C address 0x1a.
Any idea on how the address conflict with the Argon One controller can be prevented?

Always on

You pointed me to this link - https://github.com/Argon40Tech/Argon-ONE-i2c-Codes/blob/master/README.md - thanks o the code to ensure always on - 0xfe - but unsure how to access that to implement it. Ideas for an Argon-One newby?

Define fan in device tree

Hello,
I'm trying to define Argon One fan in device tree to control it directly from kernel (get a native support without using any scripts in userspace). As far as i know, there is a lot of different fan controllers on a market which are using i2c bus for PWM control. But I couldn't find anything related to this controller. Could you please give me more information regarding to your one?
Thank you in advance!

        fragment@0 {
                target = <&i2c1>;

                __overlay__ {

                        fan0: fan@0x1a {
                                compatible = ?????

                        };
                };
        };