runwalk timer

Timer to help in trainging for marathons. Set run vs walk time. Ratio of run to walk is set by web page hosted by the ESP32.

parts

1. Heltec WifiKit32 with built in OLED screen
2. 400 mAh lipo battery
3. Switch
4. Piezo Buzzer

wiring

operation

Power on device. No default is set so on first boot follow these steps:

• connect to wireless AP broadcast by the ESP32: SSID: runwalk / Password: 12345678
• navigate to webpage 192.168.10.2
• fill in the desired run and walk cycle times
• 
• click submit - on submit the ESP32 will store the settings in EEPROM for future default settings
• disconnect from the wireless AP

Screen will show how much time you have run or walked, total cumulative run/walk time, icon to show current walk or run cycle and a bar chart to show how much time is left in the current cycle.

Piezo speaker will create a low-high tone when it is time to switch to running,

and a high-low tone when it is time to walk.

case

A 3D printed case and plastic lens encase the electonics, buzzer and battery for use when running:

A switch and charging / programming port are on one side. Note that the switch needs to be in the on position when charging the battery.