Radioland Technology NRF51822-Beacon
Product description
Overview
The 51822-iBeacon wireless module is developed using Nordic’s high performance wireless SOC chip NRF51822.
It is a complete low cost, low power design for Bluetooth low energy applications.
The NRF51822 integrates a high-performance and low-power CortexM0 microcontroller core, and supports the BLE4.0 protocol stack for Bluetooth applications and a wealth of peripheral interfaces.
The module is equipped with an independent programming interface to facilitate user programming and debugging.
Equipped with buttons, long press can control module broadcast and sleep, mobile phone APP can modify module parameters.
Features
- 2.4-GHz low-power compliance and proprietary RF on-chip system
- Programmable output power up to 4 dBm
- Support IOS7.0, Android 4.3 or above
- Distance: 30 meters
- When it is not broadcasting, the current is only about 2.7uA
- High-performance and low-power enhanced CortexM0 microcontroller core
- Adopt Bluetooth Low Energy Compatible Bluetooth v4.0 protocol stack
- 256KB system program flash and 16KB SRAM
- Small size diameter: 25.0mm, thickness: 4.6mm
- PCB antenna
- Working voltage: 1.8V ~ 3.6V
Application scenario
- Indoor navigation
- Mobile payment
- In-store shopping guide
- Flow analysis
Technology parameter
| Item | nRF51822 | Item | nRF51822 |
| Supply voltage | 1.8-3.6V | Receiving current | 9.7mA |
| Frequency | 2402~2480MHz | Stand-by current | 3.1uA |
| Selectable Channel | 40 | Transmission rate | 1 Mbps |
| Modulation | GFSK | Chip flash | 256KB |
| Output Power | -30dBm~4dBm | Chip RAM | 16KB |
| Emission current (0dBm) | 8mA | Antenna form | PCB antenna |
| Receiving sensitivity | -93dBm | Communication distance | >50m |
Module introduction
Module pin
Pin No. | Item | Pin Function |
1 | BAT+ | 3.3V |
2 | BAT- | Ground |
3 | SWCLK | Digital pin module clock |
4 | SWDIO | Digital pin module data |
Module size
Interface
Service UUID：00001803-494c-4f47-4943-544543480000
| Description | UUID | Attribute | Length |
| mobile->ibeacon | 00001805-494c-4f47-4943-544543480000 | notify/read+notify | 20(Max) |
| ibeacon->mobile | 00001804-494c-4f47-4943-544543480000 | write | 20(Max) |
nRF51822 Power Comparison Table | ||
Power | Parament | 1m RSSI reference value |
0dBm | 0x00 | -54 |
4dBm | 0x04 | -50 |
-30dBm | 0xD8 | -89 |
-20dBm | 0xEC | -77 |
-16dBm | 0xF0 | -72 |
-12dBm | 0xF4 | -65 |
-8dBm | 0xF8 | -62 |
-4dBm | 0xFC | -58 |
| Num | APP Command | Return | Description |
| 1 | Change name： 0x11+name(length<=8) | 0x11 | The first connectable version reboot takes effect other versions take effect immediately all versions are saved |
| 2 | Change UUID： 0x12+16byte UUID | 0x12+16byte UUID | Immediate effect, save power Eg ： 0x12 0x11 0x11… 0x99 0x99 |<– totle16 –> | |
| 3 | Read UUID： 0x13 | 0x13+16byte UUID | |
| 4 | Change Major ,Minor battPower： 0x14+Major+Minor+BattPower | 0x14+Major+Minor +BattPower | Immediate effect, save power Major ： 2byte(eg:0x00 0x0a is10) Minor：2byte(eg:0x00 0x0b is 11) BattPower: This position is the battery power, see note 1 for details 1byte(eg:0x01) |
| 5 | Find Major, Minor, BattPower: 0x15 | 0x15+Major+Minor +BattPower | |
| 6 | Modify the broadcast interval： 0x16+1byte(0x00-0xC8) | 0x16+4byte | Immediate effect (eg:0x02 is 100ms) |
| 7 | Modify the transmit power： 0x17+1byte | 2byte | Immediate effect 2541 can write ：0x01,0x02,0x03 51822 can write：0x00, 0x04, 0xD8, 0xEC,0xF0,0xF4,0xF8,0xFC See note 2 for details |
Beacon remark
Broadcast data format
Position | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9-24 | 25-26 | 27-28 | 29 |
Data | 0x02 | 0x01 | 0x06 | 0x1A | 0xFF | 0x4C | 0x00 | 0x02 | 0x15 | uuid | major | minor | rssi at 1m |
- LED lights flash three times when Beacon is powered on
- In the power-on state, long press the button 3S, the LED flashes once, and the beacon shuts down. In the off state, press and hold the 3S button to start the beacon.
Beacon power consumption
Broadcast current test method: Beacon broadcasts a 10 ohm resistor in series, and connects the oscilloscope to the voltage across the resistor.
Static current test method: Connect the beacon in series with a multimeter to check the current
Sensorless power consumption：
Power consumption：
Quiescent Current：2.6uA
Broadcast current：14mA
Broadcast time：5ms
Broadcast interval：1000ms
Average current = 2.6uA∗995ms+14mA∗5ms 1000ms = 0.0718905mA
Use time of 2032 battery = 200mA∙ℎ 0.0718905mA ≈ 2782ℎ
Remark：
SDK download：
https://www.nordicsemi.com/api/sitecore/Products/MedialibraryZipDownlad2
Certification
Radioland Technology Co.,Ltd.
Address: 203,Block A1,ChenTian Hangcheng Industry Zone Xixiang
Town, Bao’an district, Shenzhen. China
Skype: radioland-henry
WeChat: 15712148297
Tel: +86-0755-82599763
Web: http://radioland-china.en.alibaba.com
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