Esp 01 Datasheet [verified] Site

Don’t trust random pinout images – always verify with a multimeter.

#ESP01 #ESP8266 #IoT #Datasheet #Arduino Title: ESP-01 datasheet summary – what actually matters esp 01 datasheet

✅ 3.3V only (no 5V) ✅ GPIO: 0, 2, RX, TX (only 0 & 2 are safely usable for outputs) ✅ Flash mode: GPIO0 → GND on boot ✅ Current: 200-300 mA peak – use a good 3.3V regulator Don’t trust random pinout images – always verify

The ESP-01 module put Wi-Fi into the hands of hobbyists. Before the ESP8266 NodeMCU or ESP32, there was this tiny 8-pin board. If you’re working with one today, here’s what you need from its datasheet. If you’re working with one today, here’s what

The ESP-01 is limited (only 2 usable GPIOs, 3.3V logic, current spikes), but it’s perfect for simple IoT switches, sensors, or controlling a relay. Always use a level shifter or voltage divider if connecting to 5V logic. Option 2: Short Social Media / Forum Post (Quick Help) Title: ESP-01 Datasheet – Quick reference 🔧

Here’s the short version:

| Pin | Name | Function | |-----|------|-----------| | 1 | GND | Ground | | 2 | GPIO2 | I/O (high on boot) | | 3 | GPIO0 | Boot mode (LOW = flash, HIGH = run) | | 4 | RXD | UART RX (3.3V logic) | | 5 | TXD | UART TX | | 6 | CH_PD | Chip enable (HIGH to operate) | | 7 | RST | Reset (active LOW) | | 8 | VCC | 3.3V input |