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.
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(Courtesy ecus@https://3dwarehouse.sketchup.com/)
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Specifications
| Component | Specs | Options |
| Controller | Ultra low power 16 bit Microcontroller (TI MSP430G2955) | Can be upgraded to MSP430F419A or any other variant. |
| Radio | Sub-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. |
| Antenna | Omni 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 Supply | 2 x AA batteries | Other options available > 2 x AAA > Li-Ion |
| Enclosure | ABS | 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 Switch | Mounted on the enclosure | Changeable on request |
| Sleep Mode Power Consumption | < 2 Microamps | |
| Reporting Interval | From every 1 second to once a day. | Configurable (any time) from the cloud |
| Sensor Node Identifier | Unique 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 | |
| 1 | Reports measured temperature periodically with a configurable interval – Minimum (1 sec) / Maximum (1 day). |
| 2 | Reports 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. |
| 3 | Reports 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. |
| 4 | WiSense 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 – | |
| 1 | IEEE assigned 64 bit permanent address of the node (Ex: 0xfc:0xc2:0x3d:0x00:0x00:0x1e:0xf5) |
| 2 | Battery Voltage (Milli-Volts) |
| 3 | Sensor Probe #1 Id: 0x6c Temperature: Measured Value (milli-deg C) |
| 4 | Sensor Probe #2 Id: 0x96 Temperature: Measured Value (milli-deg C) |
| 5 | Sensor Probe #3 Id: 0x97 Temperature: Measured Value (milli-deg C) |
| 6 | Sensor Probe #4 Id: 0x98 Temperature: Measured Value (milli-deg C) |
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The graph shows data from all 4 sensors.
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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.
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