I figured that if one would work, four buttons would work just as well (and it did). The finished device has four touch buttons, the prototype only one. I used most of these parts in one of three units I produced. On the right side, just below the microcontroller you see the holes where the MM232 module was (small module wih an FT232 chip). The microcontroller was in the socket in the middle. The wifi module was in the top left corner, connected with wires, floating above the PCB. Some people use stripboard but I prefer this because you don't have to break tracks and are not limited to one direction. The enclosure and schematic/PCB are available under Creative Commons ShareAlike (CC BY-SA 3.0).įor all devices I make I start with a prototype on these kind of prototype PCB's. See the README file on the Mailnotifier-Firmware repository on GitHub for more details. The touch buttons use software from Atmel used in binary form. The bootloader is a slightly modified bootloader from the Sanguino project (diffrerent baud rate, different CPU clock and different uart used). The firmware and configuration tool is available under the GPLv2 license. Enclosure designed in Inkscape and lasercut/engraved by Formulor.The software runs both on Linux and Windows. PC software to configure the device written in C# using MonoDevelop.Firmware written in C with AVR-GCC, using Eclipse as IDE.The design is more or less made with production in mind but I never continued that because the cost price was too high, the RN131 WiFi module being the most expensive part. You connect it to the computer, run the configuration program, enter the WiFi and e-mail details and from that moment on it starts reading e-mails.įinally made 3 pieces, one for him and two others for family members. What's nice is that it's completely standalone and you don't need to have it connected to the computer or run a special server or something like that. When you want to know if there are any new e-mails you just touch one of the buttons and the display lights up, showing the sender, date and subject of the 10 most recent e-mails in the inbox. The device just sits quietly, connects to a POP or IMAP mailbox, requests the headers of the 10 most recent mails and stores this data. I designed this as a non-intrusive solution to get a quick view of new e-mails. The idea comes from a friend with a busy job who suggested that after a long day at work answering all those work e-mails it would be nice to have a quick overview of his private e-mail without booting up his computer.
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