Monthly Archives: February 2021

WTM-4P-110 – WiSense Wireless Sensor Node for Monitoring Temperature during Cocoa Bean Fermentation

Our latest product enables Cocoa processors to monitor in real time the temperature of Cocoa beans during the fermentation process.

Battery powered Wireless Sensor Node with 4 Temperature Sensor Probes which can be inserted into a fermentation box.

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3D Rendering of a Cocoa Fermentation Box
(Courtesy ecus@https://3dwarehouse.sketchup.com/)

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Specifications

ComponentSpecsOptions
ControllerUltra low power 16 bit Microcontroller (TI MSP430G2955) Can be upgraded to MSP430F419A or any other variant.
RadioSub-GHz ISM Band Low Power Radio
❏ India: 865 to 867 MHz
❏ EU: 868 – 870 MHz
❏ USA: 902 – 928 MHz

> Multiple raw baud rates supported such as 1.2 kbps, 10 kbps, 20 kbps, 38.4 kbps, 100 kbps
> Modulation: 2FSK / GFSK
> Tx Power: Max 13 dBm
> Note that supported baud rates, modulation, bandwidth, duty cycle and max transmit power are subject to local ISM band regulations (ETSI / FCC / WPC etc)
Certified (FCC/ETSI) and non-certified radio module options available.
AntennaOmni Directional Half Wave Dipole External Antenna
Gain: +3 dBi gain
PCB Antenna / Internal stick-on Antenna with U.Fl connector or any other suitable Antenna.
Power Supply2 x AA batteriesOther options available
> 2 x AAA
> Li-Ion
EnclosureABS Changeable on request
Temperature Sensor> Sensor Count: Min 1, Max 4
> ±0.5°C Accuracy from -10°C to +85°C
> Overall Range: -55°C to +125°C
> Probe Length: 200 mm (Can be made shorter or longer)
Changeable on request
On/Off SwitchMounted on the enclosureChangeable on request
Sleep Mode Power Consumption< 2 Microamps
Reporting IntervalFrom every 1 second to once a day. Configurable (any time) from the cloud
Sensor Node IdentifierUnique IEEE assigned 64-bit address hardwired in onboard EEPROM
Ex: fc:c2:3d:0x00:00:11:0a:1e (all Hex)

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Temperature Data Reporting Options
1Reports measured temperature periodically with a configurable interval – Minimum (1 sec) / Maximum (1 day).
2Reports measured temperature only when it changes by a configurable percentage value with respect to the prior value reported. Also, reports measured temperature if no report sent for a configurable period of time.
3Reports measured temperature only when it crosses a configurable high or low threshold value. High and low hysteresis values are also configurable. Also, reports measured temperature if no report sent for a configurable period of time.
4WiSense can implement any custom temperature reporting algorithm.

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Each sensor data message sent by a sensor node to the cloud (via a WiSense Gateway) conveys the information listed here –
1IEEE assigned 64 bit permanent address of the node (Ex: 0xfc:0xc2:0x3d:0x00:0x00:0x1e:0xf5)
2Battery Voltage (Milli-Volts)
3Sensor Probe #1 Id: 0x6c Temperature: Measured Value (milli-deg C)
4Sensor Probe #2 Id: 0x96 Temperature: Measured Value (milli-deg C)
5Sensor Probe #3 Id: 0x97 Temperature: Measured Value (milli-deg C)
6Sensor Probe #4 Id: 0x98 Temperature: Measured Value (milli-deg C)

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Snapshot of sensor data visualized on the cloud resident WiSense dashboard.
The graph shows data from all 4 sensors.

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WSGWIX-110 – WiSense WiFi Gateway
Collects data from up to 64 sensor nodes and relays to the cloud over WiFi (Other backhaul technologies supported)

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For more information on WiSense products, please visit wisense.in.

WEM-T8R-100 – Wireless Incubation “Temp + RH” Sensor

Here are some pics of our incubation sensor egg () in action at customer premises in Pune, India.

Sensor Egg surrounded by real eggs. Thermistors being used to monitor surface temperature of 8 eggs.

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This picture shows an incubator array in operation.
Sensor Egg data is being collected by a WiSense gateway and forwarded to a Laptop for display.

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Close up of WiSense Gateway and Laptop

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For more information on WiSense products, please visit wisense.in.