

Reference: RBD-1354
Length: 8 inches/20 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: 0245
Choose your desire Resistor value from below:
Reference: 0031
3 Types Available (Please select from option) 1. Male to Male 2. Male to Female 3. Female-Female
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical
Reference: RBD-0351
Contactless transmission of data and supply energy (no battery needed) Operating distance: Up to 100mm (depending on antenna geometry) RoboticsBD Operating frequency: 13.56MHz Data transfer: 106 kbit/s Data integrity: 16 Bit CRC, parity, bit coding bit counting Anticollision Typical ticketing transaction: <100 ms ( including backup management)...
Reference: RBD-0094
Arduino UNO in Bangladesh Micro-controller : ATmega328. Operating Voltage : 5V. Input Voltage (recommended) : 7-12V. Digital I/O Pins : 14 (of which 6 provide PWM output). Analog Input Pins : 6.
The soil nutrient content can be easily measured using NPK Soil Sensor & Arduino. Measurement of soil content N (nitrogen), P (phosphorus), and K (potassium) is necessary to determine how much additional nutrient content is to be added to soil to increase crop fertility. The soil fertility is detected using NPK sensors.
A major component of soil fertilizer is nitrogen, phosphorus, and potassium. The knowledge of the soil nutrient concentration can help us to learn about nutritional deficiency or abundance in soils used to endorse plant production.
There are multiple methods of measuring the soil nutrient content using some optical sensors or using a spectrometer. But the spectral analysis method is not convenient and the drawback is the data are only 60-70% correct. While comparing the spectral analysis method with traditional wet chemistry methods, the accuracy of the products is yet to be fully resolved, given the paucity of data in that regard.
The Soil NPK sensor is a low-cost, quick responsive, high precision & portable Sensor that works with Modbus RS485. The advantage of this sensor over a traditional detection method is that it gives very fast measurement & data are highly accurate. All you need is to insert its probe into the soil and get the reading using Arduino. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
Note: Product images/ Components brand may vary from actual product as our stock rotates.
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This sensor does not require any chemical components, This sensor has Modbus communication port where we cannot connect it with microcontrollers directly but by using an intermediate Modbus module. We can connect it to most of the microcontrollers like Arduino, ESP32 and measure the Nitrogen, Phosphorus and Potassium values in Realtime, just by inserting the probes in the soil. This sensor also detects the type of the soils like Acidic soil, Alkaline soil. You need an external Modbus module such as RS485/MAX485 to connect the senor with microcontrollers.
0This sensor works with voltage range of 5v-30V with maximum power consumption less than 0.15watts. which works in the temperature range of 5-45 Celsius. Many microcontrollers such as Arduino, PIC microcontrollers, 8051 microcontrollers family, ESP etc. support this soil NPK sensor as they have baud rates of 2400,4800 and 9600. This soil NPK sensor is said to have a high precision measurements with an accuracy of ±2%, with measuring resolution of 1mg/Kg(mg/liter) and can measure the Nitrogen, phosphorus and Potassium in the range between 0 to 1999mg/kg(mg/liter).
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General Specification | |
DC power supply (default) | DC 5-30V |
Maximum power consumption | ≤0.15W (@12V DC, 25℃) |
Operating temperature | 0℃~55℃ |
Nitrogen phosphorus potassium | range: 1-1999 mg/kg (mg/L); resolution rate: 1 mg / kg (mg / L), accuracy of: ± 2% FS |
Response time | <1S |
Protection | IP68 |
Probe materials | stainless steel |
Sealing material | black flame-retardant epoxy resin |
Cable default length | 1 m |
Dimensions | 45*15*123mm |
Output signal | RS485 (Modbus protocol) |
Shipment Weight | 0.140 kg |
Shipment Dimensions | 15 × 11 × 5 cm |
Please allow 5% measuring deviation due to manual measurement.
You can find the source code and Interfacing Tutorial in the link below (Ask for permission with your ORDER ID)
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Getting 255 for all NPK values:
Getting no response from sensor data
Important Notes:
After analysis we found that this sensor is not completely accurate but works at an acceptable accuracy. Please try to find the sensor manufacturer datasheet to get the working enquiry frame data. Calibrating this sensor is still a dreamy hope for many users. This sensor is purely for soil only, measuring it in water gives foul results.
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1 x Soil NPK Sensor Agricultural RS485/Modbus
Reference: RBD-0032
Operating Voltage (logic level): 5V With Mini USB 8 analog inputs ports: A0 ~ A7 14 Digital input / output ports: TX, RX, D2 ~ D13 1 pair of TTL level serial transceiver ports RX / TX Using Atmel Atmega328P-AU MCU There is a bootloader installed in it Standard 0.1” spacing DIP (breadboard friendly). Manual reset switch.
Reference: RBD-0094
Arduino UNO in Bangladesh Micro-controller : ATmega328. Operating Voltage : 5V. Input Voltage (recommended) : 7-12V. Digital I/O Pins : 14 (of which 6 provide PWM output). Analog Input Pins : 6.
Reference: RBD-0145
Dual output mode, analog output more accurate A fixed bolt hole for easy installation With power indicator (red) and digital switching output indicator (green) Having LM393 comparator chip, stable. Operating Voltage: 3.3V~5V
Reference: RBD-0353
Driver IC: SSD1306 Support wide voltage: 3.3V-5V DC Communication: IIC Working temperature: -30-80 degrees. RoboticsBD
Reference: RBD-0560
On-board MAX485 chip, A low power consumption for the RS-485 communication, slew-rate limited transceiver. A low power consumption for the RS-485 communication Onboard then 5.08 (mm) pitch 2P terminal to facilitate RS-485 communication wiring. Slew-rate limited transceiver All pins of the chip have been lead to can be controlled through the...
Reference: RBD-1042
Operating Voltage: 3.3 ~ 5.5 VDC. Operating Current: 5mA. Interface: PH2.54-3P. Dimensions mm(LxWxH): 98 x 23 x 4. Supports 3-Pin Gravity Sensor interface Analog output. Weight (gm): 15.
Reference: RBD-1064
Size: 1.3 inch Resolution: 128 x 64 Controlling Chip: SSH1106 Driving Voltage: 3.3-5V Operating Temperature: -40~70 celsius Interface Type: IIC Light Color: Blue If you want to purchase White color 1.3 inch OLED display module click here
Reference: RBD-1671
ESP32 Bluetooth Wi-Fi development board, support NodeMCU / Arduino DHT11 temperature and humidity sensor CP2104 communication chip USB TO TTL Micro USB port Soil probe (long) soil temperature and humidity detection module 18650 Lithium Battery Holder Powered (Battery is not included)
Reference: RBD-0700
Operating Voltage: 3.3V-5.5V Low Power Consumption High Accuracy Small Size
Reference: RBD-0572
Operating Power: 60mW/15fpsVGAYUV. Sleeping Mode: <20 uA. Lens Size: 1/6″. Max. Frame Rate: 30fps VGA. Sensitivity: 1.3V / (Lux-sec). dynamic range: 52 dB. Electronic Exposure: 1 to 510 row.
Reference: RBD-0348
A Color-Coded Cable, with a standard male header connectors. Plug it straight into an Arduino or a Breadboard. No soldering is required. The Pulse Sensor has 3 holes around the outside edge which make it easy to sew it into almost anything. Visualization software (made in Processing) to instantly see the output of the sensor and for troubleshooting....
Reference: RBD-0425
Model: GY-APDS9960-3.3 Chip: APDS-9960 Power Supply: 3.3VDC Communication Through I2C Protocol. RoboticsBD
Reference: RBD-1738
Operating Voltage : 1.5 ~ 15V DC Working Current: Less than 25mA Tone Generation Range : 1.5 ~ 2.5kHz Dimensions (LxWxH): 26 x 15 x 11 mm
Reference: RBD-0575
Main color: Yellow Measure range: 0.00-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH Calibration: two points automatic calibration
Reference: RBD-0995
Diameter: 5mm No. of Pins: 2 Type of Mounting: PCB Through Hole Maximum Operating Temperature: +800°C (Approx.) Dark resistance:1-20 Mohm
Reference: RBD-0668
Crystal 32.768KHz, matching capacitance 6pF DS1302 8-pin SMD homemade chips Seconds, Minutes, Hours, Day of Month, Day of Week, and Year Operating temperature: 0 degree — 70 degree. RoboticsBD
Reference: RBD-1541
For beginners who are interested in Arduino A complete set of Arduino’s most common and useful electronic components Infrared sensor receiving module Laser sensor module Temperature and humidity sensor module Infrared sensor module 5v relay module Obstacle avoidance sensor module.
Reference: RBD-1197
The TSOP38236 is a miniaturized receiver for infrared remote control systems. A PIN diode and a preamplifier are assembled on a lead frame, the epoxy package acts as an IR filter. The demodulated output signal can be directly decoded by a microprocessor.
Reference: RBD-1199
Low-noise output Fast power-on time Ratiometric rail-to-rail output 4.5 to 6.0 V operation Solid-state reliability Factory-programmed at end-of-line for optimumperformance Robust ESD performance
Reference: RBD-1374
Model: AM2301. Supply voltage: 3.3 ~ 5.2 V DC. Signal output form: Digital signal output. Temperature measurement range: -40 ~ +80 ºC. Temperature measurement precision: ± 0.5ºC Humidity range: 10%~90%RH. Humidity measurement precision: ±3%RH.
Reference: RBD-0958
Five Operating Modes Integrated MCU Onboard Processing Standard I2C Digital Interface Optimized Low-Power Modes Optional NTC Thermistor Pins
Reference: RBD-1756
TMP36 Temperature Sensor Low Voltage Temperature Sensors
Reference: RBD-2141
Rating contract (Max.): 10 W Switching power supply (Max.): 110VDC Resistance contract (Max.): 100 Ω Appro. Float Ball Size (mm) : 24×17 (LxD) Body Total Length (mm) : 85 Cable Length (cm) : 37 Total Float opening: 70° Switch ON/OFF angle Approx. betn 15° to 20°
Reference: RBD-0667
Input Supply Voltage (VDC): 3.3 ~ 5. Supply Current (mA): measurement 0.3mA standby 60μA. Temperature measurement range: 0~50 degrees. Temperature measurement error: ±2 degrees. Humidity measurement range: 20%~95%RH. Humidity measurement error: ±5%RH. RoboticsBD
Reference: RBD-2071
Type: Magnetic Sensor Module Mainly Compatible with: Ardunio
Reference: RBD-2076
Operating Voltage:2.0v ~ 2.5v Current:10mA Diameter:5mm Color: Red + Green Beam Angle:150
Reference: RBD-0023
Wide Working Voltage Range: DC 4.5V- 20V Current Drain: <60uA Detection Angle: <140° Detection Distance: 3 to 7m (can be adjusted) Blockade time: 2.5s (Default) Work temperature: -20-+80°C
Reference: RBD-1813
ICM-20948 MEMS Motion Tracking Device Sensor Board 9 Axis
Reference: RBD-0948
Built-in Flash: 32Mbit Power supply: 5V WiFi protocol: IEEE 802.11 b/g/n Peripheral interface: UART/GPIO/ADC/DAC/SDIO/PWM/I2C/I2S Logic level: 3.3V
Reference: RBD-0396
Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions Small size, easy to use Operating Voltage: 5 V Sonar Sensing Range: 25-450 cm Max. Sensing Range: 450 cm Frequency: 40 KHz. RoboticsBD
Reference: RBD-0816
Power Supply Voltage: 3.3V~5V Operating Current: <5mA Measuring Distance: 5-100mm VCSEL light source Strong anti-interference Based on DFrobot Fermion VL6180X ToF Distance Ranging Sensor (Breakout)
Reference: RBD-1918
Speed(RPM):19000 Motor diameter: 6mm Shaft diameter: 0.8mm Shaft length: 4mm Rated voltage: 1.5V-4.5V
Reference: RBD-2087
Voltage 5V Photo interruption module triggers a signal when light is blocked between the opening of the sensor.
Reference: RBD-1188
5 mm Clear Transparent Round Small Lens (Emitting Angle: 30 degrees) Forward Voltage / Direct Current : DC 1.5 Volt 20 mA (Low Voltage Energy Saving) Infrared Ray 850nm (Luminous Invisible Light) for Night Vision CCTV Security Camera Polarity (1.5 V) : Anode (Longer Part) | Cathode (Shorter Part)
Reference: RBD-0041
Bases at CSR BC04 Bluetooth technology. with build-in 2.4GHz PCB antenna It’s at the Bluetooth class 2 power level. Range test: 10 meters Operating voltage: 3.3V to 6V DC Operating current in pairing is in the range of 30~40mA.
Reference: RBD-0387
All SD SPI pins output, MOSI, SCK, MISO, and CS. Support 5V/3.3V input. This module can handle 2GB SD cards. Size:4.7 x 3.1 cm. LED indicator. SD Card Holder. RoboticsBD Onboard 3.3V regulator (AMS1117-3.3) for +5v to 3.3V generation. 3.3V is also available as output.
Reference: RBD-2170
Visualize magnetic fields with this large, micro-encapsulated film known as field paper. This material allows the user to see the magnetic field produced by any magnet.
Reference: RBD-0156
Operating Voltage: 3V-5V High-resolution conversion of light intensity to frequency. Chip pins all has drawn for standard 100. Put the needle (2.54 mm). Mil-convenient for bitmap board. Programmable color and full-scale output frequency. Communicate directly with a microcontroller. Low-profile surface mount package.
Reference: RBD-1870
Compatible with 3.3V and 5.0V power supply. Compatible with 3.3V and 5.0V signal. Semi-hole pads, onboard module, thin PCB, having a thickness of 0.8mm. Has RXD, TXD signal indicator light, monitor send and receive status.
Reference: RBD-0560
On-board MAX485 chip, A low power consumption for the RS-485 communication, slew-rate limited transceiver. A low power consumption for the RS-485 communication Onboard then 5.08 (mm) pitch 2P terminal to facilitate RS-485 communication wiring. Slew-rate limited transceiver All pins of the chip have been lead to can be controlled through the...
Reference: RBD-0916
ROHS approved Mini Solar panel The solar cells are encased and protected by a durable outer poly frame Polycrystalline silicon Max work voltage:5V Max work current: 200ma Dimension: 90mm×90mmx3mm RoboticsBD