ESP32-wroom-32 ESP32-S programming board and breadboard adapter

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

Specs and hight resolution pinout image

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   Download

Socket for esp32-wroom-32 V base  Download

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

Bend the wire to the external of the adapter.

Cut external part of the wire, and extract,

then reinsert in the internal and external hole.

Now check if you need to cut more the wire of the internal hole, and bend It.

Repeat for all pins.

Now you can use It directly on the breadboard.

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.

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.

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.

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):

Here the milled PCB:

Here the assembly video

And here after assembly process:

Now we can upload the code, check the tutorial “ESP32-wroom-32: flash, pinout, specs and IDE configuration“.

Thanks