WiSer-USB
About the WiSer-USB PCB
WiSer-USB is an open source ESP32 PCB design by bitmerse, published on GitHub. It is a 4-layer board measuring 30.8 × 14.8 mm, with 49 components from 25 distinct parts.
Its main chip is the ESP32-S2, from the ESP32 family. Other key parts include the AP2112K-3.3TRG1 and USBLC6-2P6. By type, the board carries 23 capacitors, 9 resistors, 6 inductors, 3 ICs, 3 diodes and 2 switches.
It belongs with the iot & wireless designs in this gallery.
From the project
WiSer: Bringing wireless convenience to serial connectivity
This directory contains the hardware design files for WiSer-USB and WiSer-TTL, created using KiCad EDA.
Main components on the WiSer-USB
WiSer-USB bill of materials (BOM)
49 components, 25 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP2112K-3.3TRG1 | SOT95P285X140-5N | U1 |
| 1 | USBLC6-2P6 | SOT50P160X60-6N | U2 |
| 1 | ESP32-S2 | ESP32-S2 | U3 |
| 1 | 40MHz | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | USB_C_Plug | USB-C-Male-Conn | P1 |
| 1 | 2450AT18B100E | XDCR_2450AT18B100E | E1 |
| 1 | BOOT | SW_TL3365AF180QG | S1 |
| 1 | USER | SW_TL3365AF180QG | S2 |
| 1 | B5819WS | D_SOD-323_HandSoldering | D1 |
| 2 | LED | LED_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D2, D3 |
| 1 | BLM15PX600SN1D | R_0402_1005Metric | FB1 |
| 1 | 2n | L_0402_1005Metric | L1 |
| 1 | L_Ferrite_Coupled_Small_1243 | FIL_DLM0NSM900HY2D | L2 |
| 2 | TBD | L_0402_1005Metric | L3, L5 |
| 1 | 24n | L_0402_1005Metric | L4 |
| 9 | 0.1u | C_0402_1005Metric | C1, C2, C5, C8, C9, C11, C12, C15 +1 |
| 3 | 10u | C_0402_1005Metric | C3, C7, C13 |
| 4 | 1u | C_0402_1005Metric | C4, C6, C14, C21 |
| 1 | 100p | C_0402_1005Metric | C10 |
| 6 | TBD | C_0402_1005Metric | C17, C18, C19, C20, C22, C23 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 330 | R_0402_1005Metric | R1, R2 |
| 1 | 5.1K | R_0402_1005Metric | R3 |
| 3 | 10K | R_0402_1005Metric | R4, R6, R9 |
| 1 | 499 | R_0402_1005Metric | R5 |
| 2 | 180 | R_0402_1005Metric | R7, R8 |
WiSer-USB design files
The KiCad project lives in the bitmerse/WiSer repository on GitHub; these links point at the commit this page was built from.
WiSer-USB: common questions
What microcontroller does the WiSer-USB use?
The WiSer-USB is built around the ESP32-S2, from the ESP32 family.
How big is the WiSer-USB PCB?
The WiSer-USB measures 30.8 × 14.8 mm, has 4 copper layers and is 0.8 mm thick.
How many components are on the WiSer-USB?
49 components, from 25 distinct parts. The full bill of materials is listed on this page.
Where can I download the WiSer-USB design files?
From the bitmerse/WiSer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the WiSer-USB design in my own project?
The repository has no license, so all rights stay with bitmerse. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the WiSer-USB without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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