Telemetry (Live Data)
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One of the benefits of using a smartphone to log the data is it’s internet connection. With the exception of some tracks with poor signal, this provides an excellent opportunity to get the logged data back to the rest of the team in near real time.
The app provides three different ways to send data out.
This is our own in house system available at . Each car has a login, only people with that login can see your data. This is a free service provided by eChook to anyone using the app - it can also be used with custom hardware so long as it sends the correct data to the app (See section).
Unfortunately as of the start of 2025 the dweet.io servers have been shut down and the service discontinued. There is no direct replacement for this, however if you used dweet for the node-red integration, there is a solution using the eChook live data server - see the page for more details.
You can enter a URL, username and password into the app and it will send data to your server in the format of:
Data
Identifier
Unit
Comment
Total Voltage
Vt
Volts
Combined voltage of both batteries - ~24V expected
Lower Battery Voltage
V1
Volts
Upper battery voltage can be calculated on freeboard by Vt-V1
Current
A
Amps
Motor RPM
RPM
RPM
Vehicle Speed
Spd
Meters per second
Multiply by 2.23694 for MPH
Throttle
Thrtl
Percent
Temperature 1
Tmp1
°C
Temperature 2
Tmp2
°C
Amp Hours Used
AH
Amp hours
Lap Number
Lap
-
Current Lap number as counted by the app.
Gear
Gear
-
Current gear as calculated by app
Brake Applied
Brk
-
100 if brake is applied, 0 if not.
Longitude
Lon
Degrees
GPS Longitude. (Not available through dweet.io)
Latitude
Lat
Degrees
GPS Latitude. (Not available through dweet.io)