Product | Type① | MCU | FLASH | Battery | Battery Detect | Vext③ | Low Power④ | Display |
WiFi LoRa 32 | Dev-Board | ESP32 | 4MB | Lithium② | x | x | x | OLED (128x64) |
WiFi LoRa 32(V2) (Product ID: 1639291) |
Dev-Board | ESP32 | 8MB | Lithium② | √ | √ | 800uA | OLED (128x64) |
Wireless Stick (Product ID: 1639290) |
Dev-Board | ESP32 | 8MB | Lithium② | √ | √ | 800uA | OLED (64x32) |
Wireless Stick Lite (Product ID: 1638098) |
Dev-Board | ESP32-PICO | 4MB | Lithium② | √ | √ | 35uA | x |
Wireless Shell (Product ID: 1638101) |
Module | ESP32-PICO | 4MB | – | √ | x | 10uA | x |
LoRa Kit 151 (Product ID: 1639289) |
Dev-Board | STM32L151CBU6 | 128kB | Lithium | x | x | 7uA | x |
LoRa Node 151 (Product ID: 1638100) |
Dev-Board | STM32L151CCU6 | 256kB | 1/2 AA Lithium chlorine sulfite battery | √ | √ | 1.8uA | x |
Turtle Board (This item) |
Dev-Board | STM32L432KC | 256kB | AAA x 2 | √ | √ | 5uA | x |
LoRaWANTM | RadioShuttle |
Concentrator required | No concentrator required, the station uses regular LoRa module |
Network subscription fees (If use MQTT server) | No monthly fees |
One large radio cell | Many small independent radio cells |
Busy network in a radius of many kilometers | Small networks with no interference |
Single point of failure (Concentrator) | Automatic transmitting power adjustment – longer battery life |
High latency, larger spreading factor, e.g. SF11 (1320 ms) | Low latency, small spreading factor, e.g. SF7 (120 ms) |
Source | Parameter |
MCU | STM32L432KC(Ultra-low-power 32-bit MCU+FPU ARM® Cortex®-M4) |
LoRa chip | SX1276 |
LoRa bands | EU_433, CN_470_510, EU_863_870, US_902_928 four bands optional |
LoRa maximum output power | 18dB ± 2dB |
Hardware Resource | USART x 3; SPI x 2; I2C x 2; SAI x 1; USB 2.0 x 1 |
12 – bits ADC x 1; 12 – bits DAC x 2 | |
DMA controller | |
26 general GPIO | |
Flash | 256KB FLASH;64KB SRAM; |
Interface | Micro USB x 1; LoRa antenna(SMA) x 1, Debug interface(8-Pin) |
Size | 56.6 x 24 x 20 mm |
Battery Type | AAA x 2 |
Battery detection circuit | √ |
External device power control(Vext) | √ |
Low power design | Deep Sleep: 4uA |
Electrical characteristics | Condition | Minimum | Typical | Maximum |
Power Supply | USB powered(≥500mA) | 4.7V | 5V | 6V |
Lithium powered(≥250mA) | 1.8V | 3V | 3V | |
3.3V(pin)powered(≥150mA) | 2.7V | 3.3V | 3.5V | |
5V(pin)powered(≥500mA) | 4.7V | 5V | 6V | |
Power consumption(mA) | LoRa 10dB emission | 50mA | ||
LoRa 12dB emission | 60mA | |||
LoRa 15dB emission | 110mA | |||
LoRa 20dB emission | 130mA | |||
Output | 3.3V pin output | 500mA | ||
5V pin output (USB powered only) | Equal to the input current | |||
External device power control (Vext 3.3V) | 350mA |