After you’ve flashed and programmed your ESP-01, still using in your projects can be inconvenient if you’re not giving it a solid 3.3V or have your logic voltages set properly. Fortunately, this inexpensive adapter (or “adatper” as the case may be…) fixes these issues for you.

Specifications:

• 4.5~5.5VDC Suggested Supply Voltage
• LM1117 LDO 3.3V Voltage regulator onboard
• Tx / Rx shift leveler circuitry for 3.3 <–> Vsource translation

Note: This is not an ESP-01 programmer.