The ESP8266 ESP-01 Adapter is used for easier interfacing with the ESP8266 ESP-01 WiFi modules that can be used for wireless communications.
- ESP8266 ESP-01 Adapter with Voltage Regulator
Note that this is the adapter only. If you need the actual ESP-01+ WiFi module, they can be ordered down below.
KEY FEATURES OF ESP8266 ESP-01 ADAPTER:
- 3.3V Voltage Regulator
- 5V to 3.3V Logic Level Shifting
The ESP8266 ESP-01 are WiFi modules that can be used for wireless communications. They operate at 3.3V for power and require up to 170mA of current.
If you are using the ESP-01 with a 5V uC, the current requirements are outside what an Arduino or similar uC can supply directly from their small on-board 3.3V regulator. This adapter can be powered off of 5V-12V and supplies well regulated 3.3V to the ESP-01 socket.
It also provides level shifting for the TX/RX lines which is necessary for the safe operation of this module with a 5V uC since the I/O of the ESP-01 is not 5V tolerant.
The adapter also provides 3.3V to the CH_PD pin. The RST pin is left floating which is normal.
The module has a 4-pin header:
1 x 4 Header (male)
- RX – Recieve Data – Connects to RX on the uC
- TX – Transmit Data – Connects to TX on the uC
- GND – Ground. Connect to ground on uC or separate power supply if used
- VCC – 5-12V. May be powered off the 5V from the uC or a separate power supply.
The adapter has a 2×4-pin female header that mates with the ESP-01 module. Be sure to observe proper orientation when inserting the module into the adapter as shown on the silkscreen.
Our Evaluation Results:
These modules work well and make interfacing with the ESP8266 ESP-01 easier and less prone to issues with poor power supply regulation which is the main issue users run into when working with this module.
The level shifting uses MOSFET transistors and is a nice feature. For more detailed information on the ESP8266 ESP-01+ modules in general, checkout the module product page below.
Before they are shipped, these modules are:
- Sample tested per incoming shipment
|Vcc||Input Range||5 to 12V (5V Typical)|
|Vcc||Output to female header||3.3V|
|Imax||without Module attached||<4mA|
|Dimensions||L x W (PCB)||42mm x 24mm (1.65 x 0.95″)|
|Datasheets||Voltage regulator IC||LD1117v33|