From 341f8e16d46270b58cfe014d0e6fc91786702f7b Mon Sep 17 00:00:00 2001 From: JayWll Date: Sat, 4 Jan 2020 12:10:05 -0700 Subject: [PATCH] Updating README.md to always use latest version of the circuit diagram image --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index a7b680d..8f06a0b 100644 --- a/README.md +++ b/README.md @@ -16,7 +16,7 @@ How Does It Work? The hardware is built around a NodeMCU, which is an Arduino-compatible microcontroller with integrated WiFi. This is connected to a simple analog soil moisture sensor that's inserted into the soil itself. The moisture sensor came with a little circuit to convert the analog signal to a digital one, but it never worked so we threw it away. -![Circuit Diagram](https://cdn.glitch.com/b28f7cff-6fcc-4477-9f53-58cfa415c1e0%2FMoisture%20Sensor.png?v=1578163557215) +![Circuit Diagram](https://cdn.glitch.com/b28f7cff-6fcc-4477-9f53-58cfa415c1e0%2FMoisture%20Sensor.png) The arduino code takes a reading every hour and sends it to the app on Glitch, where it gets stored in a SQLite database. Once a week a cleanup job is triggered by [cron-job.org](https://cron-job.org) to remove readings older than 90 days from the database.