64 lines
2.6 KiB
Markdown
64 lines
2.6 KiB
Markdown
# TinyLoRa Sensor Node
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## Overview
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A Minimalistic Sensor Node for use on TheThingsNetwork.
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![Case Front](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/case_front.jpg)
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![Case Side](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/case_side.jpg)
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![Case Back](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/case_back.jpg)
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![PCB Front](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/pcb_front.jpg)
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![PCB Back](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/pcb_back.jpg)
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![PCB Back SHT](https://www.seiichiro0185.org/git/IOT/tinylora/raw/branch/master/pcb_back_sht.jpg)
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### Features
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* Small Size, only 47x36x15mm populated (SMD Version)
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* Based on widely available Atmel ATTiny84 MCU and RFM95W LoRa-module
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* 6 free GPIO-Pins from the ATTiny + Power to connect sensors on a 2.54mm pitch header
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* Optional on-board LED for status signaling (SMD Version)
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* Powered by a single CR2032 lithium battery
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* Long battery runtime using the ATTinys deep sleep mode
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* Integrated 6-Pin programming header (SMD Version)
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* Small component count
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* Fitting 3D-Printed Case
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## Subdirectories In this Repository
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* **Case:** A 3D-Printable Case, OpenSCAD and STL Files
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* **Firmware:** Example Firmware for a BME280 Climate Sensor, PlatformIO project
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* **PCB_SMD:** PCB for SMD components, KiCAD project
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* **PCB_THT:** PCB with through-hole components, KiCAD project, Currently not all Features of the SMD Version
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## Pinouts
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### PRG1 Starting from Marked Top Left Pin
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|----------|----------|
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| MISO | 3V3 |
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| SCK | MOSI |
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| RST | GND |
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### J1 Starting from Marked Pin 1
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| Number | Function | Note |
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|--------|-------------------|--------------------------------|
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| 1 | 3V3 | Directly connected to Battery |
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| 2 | GND | Directly connected to Battery |
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| 3 | ATTiny84 PA0 | i2C SCL in Example Firmware |
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| 4 | ATTiny84 PA1 | i2C SDA in Example Firmware |
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| 5 | ATTiny84 PA2 | |
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| 6 | ATTiny84 PA3 | |
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| 7 | ATTiny84 PA7 | Connected to LED-Pad D1 via R1 |
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| 8 | ATTiny84 PB2 | |
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## Thanks & Acknowledgements:
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* The [TinyTX Project](https://nathan.chantrell.net/tinytx-wireless-sensor/), which served as an inspiration
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* Everyone making [The Things Network](https://www.thethingsnetwork.org/) happen
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* Some ideas where taken from the c't magazines ["Brief-Fernmelder"](http://ct.de/wyjb) Project
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