Project: Salamander

Arduino + BME280 + OLED + DS1307RTC + LiPo + Battery Charger

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The aims of this project were to create a device which could be worn on a backpack to provide some basic information regarding temperature and altitude (and the possibility of extra functions later) in a waterproof enclosure, which is battery powered. In addition to this it would have to have the potential for the battery to be recharged via renewable energy. This would display the data on an OLED screen and incorporate a clock.

Please see log for further details

The idea of this is to create a device that can be attached to a backpack which will display data such as correct time, weather, altitude. The idea is to expand on the concept to add a compass, something to track data movement which can be saved to an sdcard for later retrieval or automatically update when you arrive back home.

Current State: Working with development

Future Additions:

  • Compass
  • UV Strength
  • Voltage reader
  • Renewable energy source
  • Data saving via tfcard
  • Data retrieval via WiFi or Bluetooth
  • Data tracking
  • Waterproof Case

Upon completion of a working prototype I will then see about reducing size and having a PCB printed for it, with the idea of removing the Nano V3 and mounting everything to the one board which hopefully will reduce size greatly.

Libraries and arduino sketch for the project v0.0.1

x-zip-compressed - 476.07 kB - 11/20/2016 at 02:37


  • 1 × Arduino Nano v3 (clone can be used)
  • 1 × BME280 Pressure, Temp and Humidity (I2C)
  • 1 × DS1307 RTC (I2C)
  • 1 × OLED 128x64 (I2C)
  • 1 × LiPo Battery 3.7v

View all 10 components

  • 1
    Step 1

    Stage 1

    Measure the perf board and measure the wires from hole to hole, I drew a diagram or this on illustrator or can be done using frtizing, I found the diagram on illustrator helped because i could just check the grid reference of the holes when I was soldering. I have read that some people map this out on graph paper so whatever you find easiest. (I didn't have graph paper to hand)

  • 2
    Step 2

    Stage 2

    Once you have mapped out the perfboard solder the first of the wires to the board, making sure you do this before adding the components and component connections (these need to be done last)

  • 3
    Step 3

    Stage 3


View all 3 instructions

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