Description:
How much water do you drink a day? You will be aware of the importance of The habit of drinking water without mentioning.
Hardware Components:
WIZnet WIZwiki-W7500 —————–2
SparkFun XBee Explorer Regulated—–2
SD card————————————–1
OLED Display (SeeedStudio)————-1
Load Cell + HX711————————-1
LED (generic)——————————2
Tact Switch———————————2
Overall Scheme:
When I drink water, a Client sends an amount of water to Host.
The host can store the amount of water and Real-time(using NTP) to SD card.
- Make a chart and tick it off each time you drink a glass.
- Automatic sensing
- Ultrasonic sensor to check the amount of water
- Measure the weight of the water.
The weight of water?
Pure water has its highest density of 1000 kg/m3 at temperature 4C(39.2F)
- 1g = 1ml
https://en.wikipedia.org/wiki/Specific_weight
Load cell + HX711
Strain gauge
The force being sensed deforms a strain gauge. The strain gauge measures the deformation (strain) as a change in electrical resistance, which is a measure of the strain and hence the applied forces.
For more information about the strain gauge , refer the following links :
https://en.wikipedia.org/wiki/Load_cell
http://www.rdpe.com/ex/hiw-sglc.htm
Make Cup holder(3D modelling)
Calibration & Measurement:
This 9V battery is 44g and I made sure that the measurements.
(W:43g -> Current weight, B:43g -> Temporary value for comparison)
For Calibration, You have to change the value of scale in the source code.
Hardware
Client
Host
Overall setup :
Operation method:
Test data
- The client sends the data to Host.
send 134: data type(Store at SD card: 1) + amount of water(34ml) - Access and request to NTP server for real-time.
- Save real-time and an amount of water in SD card.
Actual data:
- Put up a cup of water on top of the Load cell weight sensor
- Client sensed 264ml of water.
- When I was drinking water, W:0(Current weight:0, because of holding the hand), B:264(saved weight:264)
- Sensed 180ml.
- Put up a cup of water again. send data type(1) + 84ml of water.
Logged data on SD card:
Visualization
But, you don’t have to think about is do a few litres of water a day
You just have to set the target amount of water. Then you can see the percentage of data like below.
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