This project is made to receive IR transmitter information (TV remote) and control something over WiFi. This project will be used for UPnP remote controller project.
Four status LED are available:
PWR: 3.3V stateBT: Bluetooth / BLE pairing statusWIFI: WiFi connection statusSTAT: Software protocol status
Two buttons are available:
BOOT: Control processor download mode on bootEN: Control processor reset
For advanced debug, test points are available for JTAG probe and UART controller.
Note: 3D shapes were not fully configured on my setup, so some components are not displayed in the render, to be fix.
This project is based on an ESP32-C3 SoC: ESP8685H4 (4 MB Flash with no
PSRAM). ESP32 has been selected for the WiFi & Bluetooth support and the big
community to generate easily a software. The choice of "C3" is to ensure support
with the SDK for longer time and minimal footprint. ESP32 modules have not been
kept due to PCB assembly fees. Espressif hardware design rules has been take into
account following there
documentation
USB-UART bridge has not been added to reduce the number of component. The ESP32 support direct USB connection to manage debug mode with firmware download, and UART communication.
The 3.3V to power all the components is generated from an LDO using the 5V of the USB socket.
All others components has been selected from JLCPCB catalogue to minimize the cost and the assembly fees.
The board is manufactured by JLCPCB, here is the details you will require to generate an order.
Note: JLCPCB requests some modifications on output files, do not use direct export from KiCad (check the FAQ)
Files: Gerbers
| Configuration | Value |
|---|---|
| Base Materiel | FR-4 |
| Layers | 4 |
| Dimensions | 33.14 x 21.45 |
| Different design | 1 |
| Delivery format | Single PCB |
| PCB thickness | 1.6 |
| PCB color | Green (other colors have fees) |
| Silkscreen | White |
| Materiel type | FR4-Standard TG 135-140 |
| Surface finish | HASL |
| Specify layer sequence | F_Cu / In1_Cu / In2_Cu / B_Cu |
| Impedance control | Yes |
| Layer stack-up | JLC04161H-7628 |
| Via covering | Tented or Plugged |
| Min via hole size/diameter | 0.3mm/0.4mm |
| Remove order number | Specify a location |
Note: All options have not been detail here, keep default value.
| Configuration | Value |
|---|---|
| PCBA type | Economic |
| Assembly side | Top |
| Tooling holes | Added by JLCPCB |
Verify "pick & place" orientations and positions on the web viewer
JLCPCB will add 2 tooling holes for assembly (1 mm diameter near the board corners).
Note: All options have not been detail here, keep default value.
For those who want to reuse this project, here is the ESP32 pinout to manage the different input/output.
| Name | Pin | Direction |
|---|---|---|
| IR Rx | IO3 | Input |
| WiFi status | IO0 | Output |
| Bluetooth status | IO1 | Output |
| Software status | IO10 | Output |