Hi friends. In this instructables we will be going to power the ESP8266 specifically the ESP8266-01 module with battery. According to my experience, many people had the problem with powering the module with a battery as there is no battery available which can give out 3.3 volts. Or they powered the module with the hellp of voltage regulators like HT7333, SJ111733pi, LD1117v33 or LT1086-3.3. This instructable shows how to power the ESP using AA batteries. So lets start !!!
Step 1: Specifications of the ESP8266-01 -
The most important feature is that the ESP does not require perfect 3.3 volts. You can power it within a voltage range of 1.7 volts to 3.3 volts. This means that you can power the ESP8266-01 using two AA batteries of 1.5 volt which will give 3 volts to the ESP8266 which is enough for the functioning of the module.
Other specifications are -
802.11 b/g/n protocol
Wi-Fi Direct (P2P), soft-AP
Integrated TCP/IP protocol stack
Integrated TR switch, balun, LNA, power amplifier and matching network
Integrated PLL, regulators, and power management units
+19.5dBm output power in 802.11b mode
Integrated temperature sensor
Supports antenna diversity
Power down leakage current of < 10uA
Integrated low power 32-bit CPU could be used as application processor
SDIO 2.0, SPI, UART
STBC, 1×1 MIMO, 2×1 MIMO
A-MPDU & A-MSDU aggregation & 0.4µs guard interval
Wake up and transmit packets in < 2ms
Standby power consumption of < 1.0mW (DTIM3)
Step 2: The Connection -
Of course the connection is very simple.
1) The Batteries -
+ [| 1.5 volts -- | [| + 1.5 volts -- |
Connect the batteries in series to get 3 volts.
2) The ESP8266 -
Connect the VCC of the module to the positive of one battery. And the GND of the module to the negative of the other battery.