See also other communicators

Check out our new Ultra low power, easy to build, flagship communicators with nRF52840 and GPS, hundreds of hours online, 10x lower consumption than ESP32-based systems

• RakSenger - Next-generation compact messenger with GPS and large OLED, very well-known based on popular WisBlock modules from RAKwireless
• MeshSenger - Minimalist unit with small IPS LCD display based on latest Heltec Mesh Node T114

Or explore our established, easy to build Heltec based LoRa communicator:

• TrackSenger - Compact messenger with GPS based on Heltec TRACKER
• MechSenger - Low profile mechanical keyboard, large OLED display
• HelSenger - Minimalist unit with small OLED display Heltec LoRa v3

Or explore our established ESP32S3 + RFM95 LoRa platforms:

• Armachat - Popular, old but very well-tuned, established, based on the very universal PICOMPUTER platform with Color IPS display and new meshtastic UI
• PicoKeyboard - Minimalist alternative, TH components, V- style

I am an active contributor and supporter of the Meshtastic open-source project.

consider taking a look at the latest communicators with nRF52840 that will provide you with unrivaled battery life and the lowest consumption.

Important Notice

WARNING: HIGHLY EXPERIMENTAL DEVICE UNDER ACTIVE DEVELOPMENT. NOT A PROFESSIONAL END PRODUCT.

Assembly ready use variant: Currently for sale is:

• Assembled PCB with Heltec Tracker 915Mhz
• 2.42 inch Green OLED Display
• Kailh Choc Low Profile Switches - WHITE
• KEYCAPS white, green arrows, violet enter (as on main picture)
• green keyboard backlight
• 18650 battery holder, no battery
• loaded Meshtastic firmware
• no pelican case

Note: The Heltec Tracker ALL IN ONE module is not included for bare PCB. Please purchase it directly from the manufacturer.

Check new super simple messengers based on All in one Heltec TRACKER as main brain. Same firmware, same simplicity just another switches with Meshtastic support.

• TrackSenger
• MechSenger

Or older PICOmputer 28 ESP32S3 + RFM95 LoRa

• Armachat
• PicoKeyboard

I am a backer and supporter of the Meshtastic project.

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.

   Bare PCB only, no components included. Images in the gallery are for inspiration.

For this project is better Tracker without screen, you can order NO SCREEN version or remove screen from board or with combination with OLED display, onboard screen is inactive and dark

• Tracker without screen

• Heltec TRACKER order link 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 or 128x64 OLED I2C Display Module
• 1x PIEZO 1109 BUZZER (1191.7mm) LPT1109DS
• 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 7mm tactile switch for USER button, just blend legs to up a solder from bottom side
• 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 WHITE keycaps are not transparent, led backlight is almost unless. Blacks are little better, I think usable are this Keycaps - white I have black variant, now is out of stock. Maybe this (untested) Kailh - 97pcs

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:

External antenna is highly recommended (currently assembled devices are delivered without an external antenna) If you have trouble getting a GPS signal, it might be because the tracker is on the bottom side of the PCB.

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
• https://www.aliexpress.com/item/1005007541100566.html