Heltec WiFi LoRa 32 V3 SX1262 868MHz with OLED

The Heltec WiFi LoRa 32 V3 is a development board with the ESP32-S3FN8 (Wi-Fi, Bluetooth LE, 8 MB flash), the SX1262 LoRa chip for 868 MHz and a 0.96 inch OLED display (128 × 64 pixels). Compared to the V2, it has USB-C, the SX1262 instead of the SX1276 and the ESP32-S3. A charging circuit for a LiPo battery on the SH1.25 connector is built in. The board runs custom programs for LoRa and LoRaWAN and, for example, Meshtastic.

Successor: Heltec WiFi LoRa 32 V4 2MB SX1262 868MHz with OLED

Important: In Switzerland, a maximum of 25 mW (14 dBm) usually applies in the 868 MHz band. The transmit power is set in the program.

Recommended Accessories:

• IPEX to SMA Female Adapter 2pcs
• 868MHz LoRa Horizon Antenna SMA M Flexible 17cm

Features:

• ESP32-S3FN8, dual-core Xtensa LX7 up to 240 MHz, 8 MB flash
• Wi-Fi 2.4 GHz and Bluetooth LE
• SX1262 LoRa chip, transmit power up to 21 ± 1 dBm
• OLED display 0.96 inch, 128 × 64 pixels, SSD1306
• USB-C with CP2102 USB-serial chip
• Charging circuit for a 3.7 V LiPo battery on the SH1.25 connector, with overcharge protection and battery voltage measurement
• IPEX antenna connector for LoRa
• Deep sleep below 10 µA

Application Examples:

• Meshtastic nodes for text messages without a mobile network
• LoRaWAN sensor nodes
• LoRa point-to-point connection
• Integration into Home Assistant with ESPHome

Documentation:

• WiFi LoRa 32 V3: product page (Heltec, English)
• Heltec ESP32 library on GitHub (Heltec, English)
• Meshtastic on Heltec LoRa 32 (meshtastic.org, English)
• ESPHome documentation: SX126x Component

Technical Data:

• Manufacturer: Heltec Automation
• Manufacturer SKU: HTIT-WB32LA868 V3
• Version: 3.0
• Microcontroller: ESP32-S3FN8
• CPU: dual-core Xtensa LX7, up to 240 MHz
• SRAM: 512 KB
• Flash: 8 MB
• Wireless: Wi-Fi 802.11 b/g/n, Bluetooth LE
• LoRa chip: SX1262
• Frequency: 863 to 870 MHz (EU868)
• Transmit power: up to 21 ± 1 dBm
• Sensitivity: -134 dBm (SF12, 125 kHz)
• Range with line of sight: 2.8 km
• USB-serial chip: CP2102
• USB connector: USB-C
• Display: OLED 0.96 inch, 128 × 64 pixels, SSD1306, blue
• Battery connector: SH1.25 (JST 1.25 mm), LiPo 3.7 V
• Logic level: 3.3 V
• Operating voltage: 3.3 to 7 V
• Deep sleep: below 10 µA
• Operating temperature: -20 to 70 °C
• Dimensions: 50.2 × 25.5 × 10.2 mm
• Weight: 30 g

Scope of Delivery:

• 1× WIFI LoRa 32 V3 SX1262 868MHz with OLED
• 1× LoRa antenna with IPEX cable
• 2× pin header 18 pins
• 1× SH1.25 cable for the battery