General Features / Specs
- Manufacturer: Heltec Automation
- PCB Model: HTIT-WSL_V3 (433MHz)
- Core IC: Espressif ESP32-S3FN8 (Xtensa® 32-bit LX7 Dual-Core Processor, Up to 240MHz)
- Flash Memory: 8MB Quad SPI In-Package Flash
- ROM: 384kB
- SRAM: 512kB
- RTC SRAM: 16kB
- USB to UART Interface IC: Silicon Labs CP2102
- LoRa Chip: Semtech SX1262
- LoRa Antenna Connector: Male IPEX Socket (1st Gen)
- LoRa Frequency: 433MHz
- Battery Connector: 2-Pin SH Series Socket (1.25mm Pitch)
- Battery Interface Features: Integrated Lithium battery management system (Charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching)
- Lithium Battery Supply Requirements: 3.3 – 4.2VDC (≥ 250mA)
- USB Connector Type: USB Type-C
- USB Interface Features: ESD protection / Short Circuit Protection / RF Shielding
- USB Supply Requirements: 4.7 – 6.0VDC (≥ 500mA)
- 3.3V Pin Supply Requirements: 2.7 – 3.5VDC (≥ 150mA)
- 3.3V Pin Max Output Current: 500mA
- Typical Current Consumption (USB Powered): WiFi Scan – 115mA / WiFi AP – 150mA / BT – 115mA / LoRa TX @ 14dB 868MHz – 200mA / LoRa TX @ 22dBm 868MHz – 230mA / LoRa RX @ 868MHz – 90mA (Tx Disabled) / Sleep – 2mA
- Certifications: CE
- Operating Temperature: -20 to +70°C
- Dimensions: ~(58.08mm x 22.6mm x 8.2mm)
WiFi Features / Specs
- WiFi Protocols: 802.11 b/g/n (1T1R mode with data rate up to 150 Mbps)
- Frequency Band: 2.4GHz (Supports 20MHz and 40Mhz Bandwidth)
- Wireless Network Modes: Station / SoftAP / SoftAP + Station
- Hardware Features: 45x Programmable GPIO’s / 4x SPI / 1x LCD Interface / 1x DVP Camera Interface / 3x UART / 2x I2C / 2x I2S / 1x RMT (TX; RX) / etc
- WiFi Security: Secure Boot / Flash Encryption / 4k-bit OTP, up to 1792 bits for users / Cryptographic Hardware Acceleration
Bluetooth Features / Specs
- Bluetooth Protocols: Bluetooth LE – Bluetooth 5, Bluetooth Mesh
- Power: Up to 20dBm
- Speeds: 125kbps / 500kbps / 1MBps / 2MBps
- Other Features: Internal co-existence mechanism allowing WiFi and Bluetooth to share a single antenna
LoRa SX1262 Features / Specs
- Working Frequency: 433Mhz
- Receive Sensitivity: As low as -148dBm
- RX Current: 4.6mA
- Transmit Power: Up to +22dBm
- Programmable Bit Rate: Up to 62.5kbps LoRa and 300kbps FSK
- Modulation Types: FSK / GFSK / MSK / GMSK / LoRa / Long Range FHSS