When making IoT development, you need to debug on the Field. I’ve been using some serial logger to store information and analyze them after (I’ll post something about it once a day). But sometime you want to watch it in real time. So you need a small terminal you can easily transport with you. Smartphone could be cool and I’m sure we can hack something fun with a BLE connectivity. By the way, what I had in stock for doing a such thing was a Wio Terminal from Seeed.
This device is an Arduino compatible solution including a LCD screen 320×200, some interesting embedded sensors and a lot of IO to play with. The only bad point for me and the design I want to do is the absence of internal battery so you need to power it a different way.
What I need is just a Serial line to print on the LCD screen all what my IoT device want to share. Let see how I did make it.Continue reading