HL2 and ATU-100

Albin Stigö

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May 5, 2021, 12:34:41 PM5/5/21

to Hermes-Lite

Hello,

I was wondering if anyone is using the HL2 with the ATU-100 tuner kit?
I've successfully used my HL2 with my Icom AH-4 (which of course is a
much better tuner than the ATU-100, but I like tinkering).

https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards

All the best,
Albin SM6WJM

Albin Stigö

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May 5, 2021, 1:41:46 PM5/5/21

to pen...@gmail.com, Hermes-Lite

Thanks Mike!

I will take a look.

--Albin

On Wed, May 5, 2021 at 7:02 PM Pencoys <pen...@gmail.com> wrote:
>
> There is a mod for the ATU100 which emulates the AH4 interface.. its still a
> work in progress but getting there...
> http://www.carnut.info/IC-705/ICOM_IC-705.html#ATU100
> hth, 73 Mike G8NXD

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Steve Haynal

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May 5, 2021, 2:05:22 PM5/5/21

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Hi Albin,

Please take a look at this thread:

https://groups.google.com/g/hermes-lite/c/FYS15G-tWhs/m/e8LL3TZqAwAJ

I've configured my ATU-100 to work in automatic mode and low power.

73,

Steve

kf7o

Albin Stigö

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May 5, 2021, 3:47:04 PM5/5/21

to Steve Haynal, Hermes-Lite

Thanks Steve!

I will try your approach. Also have a pickit3. I was a bit disappointed the firmware use the commerical mikroC IDE which is only available commercially and windows only. I feel the firmware could be easily modified to emulate an Icom tuner.

I also reduced the ratio on the coupling transformer to 1:6 but perhaps I should go even lower.. did you use 1:5?

--Albin

To view this discussion on the web visit https://groups.google.com/d/msgid/hermes-lite/ea1a2033-5be2-4168-960d-2dbc50e7a1b7n%40googlegroups.com.

Steve Haynal

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May 6, 2021, 1:06:10 AM5/6/21

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Hi Albin,

I didn't deviate from the video and notes, so have 1:5.

73,

Steve

kf7o

Albin Stigö

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May 6, 2021, 9:20:11 AM5/6/21

to Steve Haynal, Hermes-Lite

Steve,

You could probably also attach it like an AH-4 and wire start to the
tune button and tx_req to key.

https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards/issues/56

--Albin

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Florian Thienel

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May 9, 2021, 7:15:35 AM5/9/21

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Hi Steve,

I placed my ATU-100 at the feeding point of my antenna, using a bias tee to power it. To control the ATU-100 I use an ArduinoNano that replaces and simulates the display on the i2c and an ESP8266 which connects to my MQTT broker via Wifi and is connected to the ATU's button connector. The ESP-8266 receives all the data "displayed" through a serial connection from the Arduino and publishes everything via MQTT. This blends in great with the rest of my automation efforts using NodeRED.

I published my KiCAD files on github: https://github.com/ftl/atu100wifi/ (but be aware: this was my very first hardware project...).

73, Florian DL3NEY

Steve Haynal

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May 10, 2021, 12:46:30 AM5/10/21

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Hi Florian,

Thanks for sharing your project! I was thinking of something similar and will take a close look at what you've done.

73,

Steve

kf7o

Pierre Martel

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Nov 21, 2021, 10:20:59 PM11/21/21

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Hi Steve, do you think it would be possible to interface the ATU-100 or ATU-10 SWR bridge to the HL2 in some way so that it would be avaialble to the multiple SDR software?

Or would you think that interfacing a esp8266 to the i2c port of the ATU-100 and emuling the screen as Florian did would be a better way to give access to such information?

Then the coder of the different software could use that info into their software to be displayed?

Pierre

VE2PF

Florian Thienel

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Nov 22, 2021, 10:45:14 AM11/22/21

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Hi Pierre,

If you want to directly connect the ATU-100 to the HL2's I2C bus, the tuner has to be an I2C slave. I was not able to build an alternative firmware for the used PIC to make the tuner an I2C slave. The original firmware uses two pins of the PIC that are not intended to be used for I2C, hence you cannot use the hardware support for I2C of the PIC but instead have to implement I2C purely in software. This is not difficult when you need to build the I2C master, but impossible on this specific PIC to implement the I2C slave (at least for me).