Sensors on the baby carriage
This is actually the second version of this project. The previous build is completed and consists of a Rpi3 with three temp sensors and the SenseHAT.
This project is trying to move to a smaller Pi Zero-W with one external temp sensor (ds18b20),the EnviroPHAT and the Adafruit Ultimate GPS v3 (using an external active GPS antenna). Possibly also integrate with the LiPo board as well for better power supply.
The code will also livestream to an InitialState bucket instead of my own monitoring platform at home (which I'd guess not many 'normal' people have build in their home ...)
--> image: The device itself, with the active antenna in the back and the ds18b20 temperature sensor on the right
The following sensor inputs are used:
| Sensor | cmd | |
|---|---|---|
| temperature (pi) | ||
| temperature (enviro) | ||
| temperature (ds18b20 sensor headliner) | ||
| pressure | ||
| heading (enviro motion) | ||
| light (intensity, dark-bright) | ||
| latitude (gps) | ||
| longitude (gps) | ||
| speed (gps) | ||
| altitude (gps) | ||
| heading (gps, north east south west) | ||
| satellites (gps, #) | ||
| stance (enviro, accelerometer 3-axis) |
In order to use the ds18b20, which connects to GPIO 4, the LEDs of the enviroPHAT are not connected (as they also use GPIO 4). So no illumination but we retain the light intensity sensor.
Power usage is 2 Watt (+/- 400 mA), Voltage is 5V, Runtime is 24 hours C = xT C = 0.4 * 24 C = 9.6 amp hours Required minimal 9600 mAh to run for 24h
Muiltple files for multiple goals:
- stream to Initial State --> vegasmonitor-streamer.py-example
- stream to Cayenne --> vegasmonitor-mqtt.py-example
The BabyCarriageMonitor currently has a 3G USB dongle attached. An OpenVPN tunnel is automagically started to my network at home essentially making the device a part of my home LAN. Easier remote management.
Currently working on a smaller, more dedicated hardware/code voor the next generation version 3 based on the PyCom platform. PyCom SiPy (bluetooth, WiFi, Sigfox networks), the PyTrack for motion/GPS sensors and the trusty db18b20 temp sensor. By using the Sigfox network , the range is increased to most of Europe but without the cost of 3G data. The platform itself is inherently more low-power.