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PCB to report temperature from 4 k-type thermocouples over wireless, for viewing on a smartphone.
- Form Factor: Raspberry Pi Shield
- Power Source: Initially battery powered with on/off switch. ** Future: solar or thermoelectric generator(TEG) using heat from oven.
- Thermocouple Measurement: MAX31855 Datasheet via SPI in an SO-8 package
- Wireless Connection: WiFi Dongle
- Configuration/Display: via SD Card ** LEDs for display- 1 LED for wireless connection
- Smartphone Display: Ideally would be accessible across multiple smartphone platforms, so no native app. ** Better to have a webserver run on the device itself, i.e. Flask
- Clock: 11
- MISO: 9
- CS1: 18
- CS2: 23
- CS3: 24
- CS4: 25
- Also need +3.3V and ground available to shield
- When Flask receives request for current temperatures, o
chmod 755 nodejs sudo cp nodejs /etc/init.d sudo update-rc.d nodejs defaults
sudo apt-get install avahi-daemon sudo insserv avahi-daemon
Component | Raspberry Pi | Arduino (TC shield + wifi breakout) -----------+----------------+------------------------------------- Controller | $35 | $7 Crystal | | $1 Regulator | | $2 Wifi | $15 | $35 SD card | $8 |
Subtotal | $58 | $45
4xTC | $32 Custom PCB | $15?
Enclosure | LiPo Battery | LiPo Charger |
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