part 2: Molding the Basic Node
part 3: Software for the Basic Node
In part 2 we describe how-to make a mold form for the basic node. We need three forms:
- the mold form which consists of two parts
- the inlay which protects the electronics of the basic node
- a “hanging” for the inlay
We used Tinkercad to construct the parts. The molding form is based on Tinkercad’s banana form. You can edit and share them from your browser:
Assembling the Inlay
We use the inlay to protect the electronics.
Now prepare the silicone. We use Shore A 45 silicone (approx. 250 ml) from Silikonfabrik.de. It is hard but still a bit flexible. You may add color, too. You have about 10 minutes to stir the silicone and poor it in the form.
After some hours you can remove the form. As you can see there is overhang which make removing the form very hard. The form could break when removing. Better preparation of the form (eg rasping) could improve the results.
If the blue LED of the Wemos board is still active you were successful.
Now you need a charging station. The construction is shown here. It is also possible to connect the sender (or transmitter) module with a 5V power source (eg. from the USB port). Just put the bottom of the molded basic node on the sender coil.
In the next part we introduce an updated version of the software including over the air update and WiFi management.