For personal use, not for resale!

Check new super simple messengers based on All in one Heltec TRACKER as main brain.

Same firmware, same simplicity as TrackSenger, just another switches now with Meshtastic support.

I am a backer and supporter of the Meshtastic project.

TrackSenger https://www.tindie.com/products/7635/

MechSenger https://www.tindie.com/products/7398/

Or older PICOmputer 28 ESP32S3 + RFM95 LoRa

Armachat https://www.tindie.com/products/3794/

Keep in mind that this is a somewhat expensive project. Before you start, calculate the costs of the necessary components such as switches, keycaps, display, and tracker.

Heltec TRACKER order link https://s.click.aliexpress.com/e/_oFbTKYO

The package includes all necessary components: battery connector, antenna with SMA, and male headers.

Bill of Materials (BOM): Required components if you order the bare PCB only

1x this motherboard PCB

1x Heltec TRACKER without display, order link 

The package includes all necessary components: battery connector, antenna with SMA, and male headers.

1x 2.42" OLED display 128x64 OLED I2C Display Module https://www.aliexpress.com/item/1005005241315177.html or 128x64 OLED I2C Display Module https://www.aliexpress.com/item/1005006357395269.html

1x piezo beeper

4x female headers

1x side switch for battery power JS102011SAQN C&K or similar

36x Kailh low profile switches

36x optional LED for keycaps backlight, etc. my poisonous green are OSG5060341F OPTOSUPPLY

1x optional 18650 battery holder

1x cca 75R resistor for backlight LEDs current limit

Assembly note!

If you plan to have backlit keys, remember to solder the LEDs before soldering the switches.

Chosfox wite keycaps are not transparent, led backlight is almost unless.

I think usable is this Keycaps - white I have black variant, now is out of stock.

https://www.aliexpress.com/item/32980986552.html

Maybe this (untested) Kailh - 97pcs

https://www.aliexpress.com/item/1005004545038847.html

Getting it up and running is simple. You will need to upload the firmware, but you can use the WebFlasher for that.

Just select TrackSenger (big OLED).

GPS note:

If you have trouble getting a GPS signal, it might be because the tracker is on the bottom side of the PCB, causing the antenna to be slightly recessed and hindering signal reception. You can improve this by disconnecting the antenna from the tracker and giving it a small leg or by using an external antenna. The antenna uses just one wire but is attached with double-sided tape.

Kailh Choc Low Profile Switch:

There are many different sellers of switches on AliExpress, offering various quantities. For mechanical switches, pay attention to the color, as it determines the switch's characteristics, such as whether it is quiet, how it responds, etc.

For example, I really like the clicky sound, so I use white switches.

Each product line has different color properties. You can check out some reviews on YouTube before order.

https://www.aliexpress.com/item/1005005066585322.html

https://www.aliexpress.com/item/1005005446722280.html

Kailh Choc Low Profile Switch Keycaps:

https://chosfox.com/collections/chosfox-exclusive/products/chocfox-wob

https://www.aliexpress.com/item/1005005291084816.html

https://www.aliexpress.com/item/1005005830330705.html

https://www.aliexpress.com/item/32980986552.html

https://www.aliexpress.com/item/1005004545038847.html