Presence Light
Project Reason:
I have thought of this project, because coworkers walk 100 meters shaking the whole building just to see that the guy(coworker) behind me is not in his seat.
So i thought: "Why not make something, where he(guy behind me) can signal his presence.
I will create the project in parts or sub-projects:
LoRa Sender and Receiver with Dormant and RTC Alarm (RP2040)
This project focuses on the DORMANT mode of the RP2040. Furthermore the SX1278 is used to establish an encrypted communication between a sender and a receiver device. While saving energy through the DORMANT mode is the essential topic here, the GPIO-Wakeup(sender) and the RTC-Wakeup(receiver) are the key to save power but also be able to communicate.
Status:
Done
12.02.2025
Using Low Power E-Ink Display on Sender and Receiver to indicate the presence
To minimize the drawn current during the standby phases, instead of LED´s E-INK displays are used for indicating the current state. This sub-project takes the previous code from the first sub-project and adds the libraries and code for the E-INK display. Moreover the hardware got more compact with minor additions to make it work and prepare it for printed housing later on.
Status:
Done
12.07.2025
Powering everything through a battery
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Status:
Open
XX.XX.2025
Building or printing a housing for the complete device and function tests
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Status:
Open
XX.XX.2025