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TTGO T-Higrow ESP32 Soil Tester DHT11 BEM280 Garden Flowers Temperature Moisture Sensor WiFi Bluetooth Wireless Control Meter Description: | Buck module | |
T-Higrow Introduction * This capacitive soil moisture sensor differs from most of the resistive sensors on the market, using capacitive sensing principle to detect soil moisture. * It avoids the problem that the resistance sensor is easy to corrode and greatly prolongs its working life. Note: * Since BME280 already includes temperature and humidity sensor, it already includes the function of DHT11, we have removed the DHT11 sensor on the BME280 version to reduce costs . | ||
Hardware Specifications | ||
Chipset | ESPRESSIF-ESP32 (Wi-Fi & Bluetooth) 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor | |
FLASH | QSPI flash 4MB | |
SRAM | 520 kB SRAM | |
Button | IO0 | |
Wake up | IO35 | |
Modular interface | UART、SPI、SDIO、I2C、LED PWM、TV PWM、I2S、IRGPIO、ADC、DACLNA pre-amplifier | |
On-board clock | 40MHz crystal oscillator | |
Temperature and humidity sensor | DHT11 or BME280 | |
Reserved extension interface | 21~22 | |
Working current | About 150 mA | |
Sleep current | About 220 uA | |
Working temperature range | -40℃ ~ +85℃ | |
Size&Weight | 155.04*35*8.19mm(13.65g) | |
Power Supply Input | USB 5V/1A | |
Charging current | 500mA | |
Battery Input | 3.7-4.2V | |
Battery | 3.7V lithium battery | |
Charge IC | TP4054 | |
JST Connector | 2Pin 1.25mm | |
USB | Type C | |
Standard | FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC (ESP32 Chip) | |
Protocol | 802.11 b/g/n(802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4μS Protection interval | |
Frequency range | 2.4GHz~2.5GHz(2400M~2483.5M) | |
Transmit Power | 22dBm | |
Communication distance | 300m | |
Wi-Fi Mode | Station/SoftAP/SoftAP+Station/P2P | |
Security mechanism | WPA/WPA2/WPA2-Enterprise/WPS | |
Encryption Type | AES/RSA/ECC/SHA | |
Firmware upgrade | UART download/OTA(Through network/host to download and write firmware) | |
Software Development | Support cloud server development /SDK for user firmware development | |
Networking protocol | IPv4、IPv6、SSL、TCP/UDP/HTTP/FTP/MQTT | |
User Configuration | AT + Instruction set, cloud server, android/iOSapp | |
OS | FreeRTOS | |
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