ESP32-wroom-32 ESP32-S programming board and breadboard adapter (original) (raw)
esp32-wroom-32 programming flash connection PCB main
I will use esp32-wroom-32, but first I want to prototype my project on breadboard, the IC is not suitable for breadboard, so I go to make a 3D printed adapter and PCB to get a generic programming board.
You can find the esp32-wroom-32 and esp32-s on ESP32 Dev Kit v1 - TTGO T-Display 1.14 ESP32 - NodeMCU V3 V2 ESP8266 Lolin32 - NodeMCU ESP-32S - WeMos Lolin32 - WeMos Lolin32 mini - ESP32-CAM programmer - ESP32-CAM bundle - ESP32-WROOM-32 - ESP32-S
ESP32 programming board Aliexpress adapter esp8266 esp32
ESP32 S pinout low resolution
Specs and hight resolution pinout image
ESP32 wroom 32 pinout
_Specs and hight resolution pinout image
3D printed adapter
A good and fast solution is to print one adapeter. Exists a lot of adapter, but I think this is a good choice, you must print with reduced extruder size like 0.31 and reduce the flow to get a good print.
Socket for esp32-wroom-32 V base
Now you must add the wire, but first probably your printer generate waste and close the little hole, usually I’m going to drill It to clear with 0.9mm bit of my CNC.
CNC drill bits on AliExpress
I use a telephone wire that is a single copper wire with 0.6mm of diameter, and I’m going to insert in the adapter, but I recommend you to use a high conductivity copper wire.
Insert it into the innermost holes and push it out about 3mm
esp32 wroom 32 socket wiring step 01
esp32 wroom 32 socket wiring step 02
Bend the wire to the external of the adapter.
esp32 wroom 32 socket wiring step 03
esp32 wroom 32 socket wiring step 04
Cut external part of the wire, and extract,
esp32 wroom 32 socket wiring step 05
then reinsert in the internal and external hole.
esp32 wroom 32 socket wiring step 06
Now check if you need to cut more the wire of the internal hole, and bend It.
esp32 wroom 32 socket wiring step 07
Repeat for all pins.
esp32 wroom 32 socket breadboard friendly
esp32 wroom 32 socket breadboard friendly bottom
Now you can use It directly on the breadboard.
esp32-wroom-32 socket programming flash breadboard photo
Programming board PCB
The next step is to do a PCB instead the breadboard to program the device, I’m going to use the adapter only to create/test new circuit.
ESP32 wroom 32 S programming board pcb
Here the list of component:
Shopping List
| Amount | Part Type | Properties |
|---|---|---|
| 2 | Electrolytic Capacitor | capacitance 10µF; package 100 mil [THT, electrolytic] |
| 1 | Electrolytic Capacitor | capacitance 22µF; package 100 mil [THT, electrolytic] |
| 1 | FTDI Basic Programmer | voltage 3.3V; tipo Basic |
| 4 | Generic female header – 1 pins | package THT; form ♀ (female); row single; pins 1; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 4 | Generic female header – 14 pins | package THT; form ♀ (female); row single; pins 14; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 2 | Generic female header – 3 pins | package THT; form ♀ (female); row single; pins 3; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 2 | Pushbutton | package [THT] |
| 1 | Power Jack | variant slt; package power_jack_slot; tipo 5.5mm barrel |
| 1 | Generic male header – 3 pins | package THT; form ♂ (male); row single; pins 3; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 1 | Generic male header – 2 pins | package THT; form ♂ (male); row single; pins 2; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 2 | Generic female header – 5 pins | package THT; form ♀ (female); row single; pins 5; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm |
| 1 | Blue (505nm) LED | package 3 mm [THT]; leg yes; colore Blue (505nm) |
| 1 | LD1117V33 | voltage 3.3V; package 78xxl; chip LD1117VXX |
| 1 | ESP-WROOM-32 [ESP-32S] Module | variant variant 3; flippedsmd true; tipo ESP32 Module; part number ESP-WROOM-32 |
| 2 | 10kΩ Resistor | resistenza 10kΩ; package THT; tolerance ±5%; bands 4; pin spacing 400 mil |
| 1 | Toggle Switch | package THT; switching circuit SPDT |
Here some material more difficult to find:
Here the IC ESP32 Dev Kit v1 - TTGO T-Display 1.14 ESP32 - NodeMCU V3 V2 ESP8266 Lolin32 - NodeMCU ESP-32S - WeMos Lolin32 - WeMos Lolin32 mini - ESP32-CAM programmer - ESP32-CAM bundle - ESP32-WROOM-32 - ESP32-S
Barrel jack Aliexpress Breadboard friendly 5.5x2.1 - Aliexpress 5.5x2.1
Voltage regulator AliExpress SMD (AMS1117) - AliExpress 3.3v (LM1117) - AliExpress 5v (7805) - AliExpress 9v (7809)AliExpress 12v (7812) - AliExpress 3.3v TO-92 (78L33)
Here the FTDI USB to TTL CH340G - USB to TTL FT232RL
Based on the tutorial “ESP32-wroom-32: flash, pinout, specs and IDE configuration” I create a PCB.
esp32-wroom-32 programming flash connection PCB
You can get pcb without additional costs here from PCBWay
I chose this manufacturer because at the same cost it offers excellent quality, in the first screen it is possible to make countless options suitable for every need.
PCBWay Option Page
The board as you can see on various photo is very beautiful and simply to solder.
The PCB is fully tested with my standard process, first milling process like the tutorial (with my CNC):
esp12 programming flashing board milling process
Here the milled PCB:
esp32 wroom 32 socket milled PCB
Here the assembly video
And here after assembly process:
esp32-wroom-32 programming flash connection PCB assembled
Now we can upload the code, check the tutorial “ESP32-wroom-32: flash, pinout, specs and IDE configuration“.
esp32-wroom-32 programming flash connection PCB assembled programming
ESP32 wroom 32 S programming board pcb