![]() I have also started the schematic for the PCB, when that is completed then I'll be able to design the rest of the enclosure around the PCB since I'm not sure how big it will be. I have also done a successful test of the POE board and I have got it to appear in the ESPHome UI, In order to move my software to this poe board ill just need to change some pins since they are being used by the onboard ethernet and remove the wifi stuff. On the breadboard is an ESP32 dev board, a reed switch module with sensitivity control, and the TMC2208 driver. Here you can see the current setup I'm using to test the blinds. I have got a big chunk of the program working but its definitely not polished, I need to add some error checking and things to ensure that the blind always knows the current position, I used the endstop cover example from esphome but I may try out the other ones such as the time based one but for now, I will try to implement some manual control buttons for easy control of the blinds without having to open the app or if my pc is turned off. I may play around with the pulley size in order to increase the speed. The wizards in the Esphome discord should be able to help me out with that. I have been using the mechanism and electronics since the last update and from using it I have discovered that the esp32 doesn't boot reliably, sometimes it takes ages for the device to show up as available in HomeAssistant and sometimes it appears within a few seconds, and then sometimes it will go offline while the blinds are going up or down and I have to quickly scramble to disconnect the battery. After that, I'll do some finishing up of the esphome and home assistant stuff. If I'm not confident with the design I may make an evaluation-style board just for testing and it will allow me to make some changes to the connections and will have footprints for different components, I'll also be able to see if any components need more cooling although I will be following advice for the layout in the datasheets.Īfter this POE design is done I will move onto creating an enclosure for the PCB which is attached to the rest of the mechanism. ![]() This reference design is very expensive (estimated about £40 per board) so I will most likely stick to using the schematic of this LILYGO board as it's definitely cheaper, and simpler although that schematic is for a 5v output so I'll need to figure out how to get 12v if it's possible, I am way out of my comfort zone and well past my knowledge barrier that's why it's taking so long. I am following a reference design from TI but I am still looking at other designs which are smaller and have a low BOM cost to hopefully only have one board. I think I'll need a board to do the conversion of POE to 12v 30W and a separate board where the esp32, stepper driver, and other electronics will be attached.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |