The iB005N-SMA is no longer manufactured and has been replaced with the S1-SMA.
The S1 USB doesn’t use batteries and instead uses USB for power. The USB isn’t used to set up the beacon and the manufacturer smartphone app, via Bluetooth, is used instead. The ‘SMA’ means it has an external rather than PCB antenna which moves the antenna away from the device supplying the USB power thus providing better Bluetooth radio signal and longer range. The S1 is also available without an external antenna.
We have a few iB005N-SMA remaining in stock of you particularly need that model.
Since we have been selling the AKMW-iB003N-SHT and AKMW-iB004N PLUS SHT we have been getting a few questions regarding accessing the temperature and humidity data.
You should first read the manufacturer’s SHT20 User Guide (username and password supplied with your beacon).
If you are connecting via GATT to read the sensor data then you will need to set the beacon to be always connectable. The way to do this is (for some strange reason) only shown in the iB001M user guide:
So if you wish to transmit iBeacon and remain connectable, set the value to 0x82. Note that if you subsequently set the beacon ‘on’ or ‘off’ in the ‘simple’ configuration screen, accessed via the spanner icon (Android) or Configure option (on iOS), then this will overwrite your set value.
However, you might instead consider reading the sensor data from the advertising data which a) is much easier to program and b) uses much less beacon battery power and c) allows multiple apps to see the data at the same time.
One of the great things about AnkhMaway beacons is that they provide the battery level in the advertising data. This allows you to view or easily programmatically determine the battery level without connecting. For example, here’s the output from the Android iBeaconDetector app:
The last two useful hex characters of the advertising data, ‘5E’ in this case, gives the level out of 100. You can use an online Hex to decimal converter to see the value in decimal that’s 94% in this case.
Note that the battery level in the advertising data is only present for recent firmware versions which might not be the case if you haven’t purchased the beacons from BeaconZone.
We have several clients using the temperature sensor beacons in industrial situations. A question we have had is how is the temperature/humidity calibrated? For scenarios that require monitored temperature/humidity, it’s often necessary to show the readings have been calibrated over time.
M52-SA Sensor beacon
The long term drift of the sensor is <0.04C/yr and <0.5 RH/yr so in most applications it doesn’t usually need calibration. If you need accuracy better than this you will need to calibrate in the software of the phone/device that receives the beacon signal. That is, you will need to periodically measure the real temperature/humidity using another calibrated instrument and apply any offset to the read values.
The iB003N can transmit up to three channels: iBeacon, Custom and Accelerometer Data. If you only want to send iBeacon, the iOS and Android app ‘Config’ screen implicitly sets the state to iBeacon only transmission when you set the iBeacon parameters.
On iOS only, the Eddystone screen allows you to set the custom channel to send Eddystone that implicitly sets the state to transmit the Custom channel only.
What if you want to transmit both iBeacon and Custom channels or also send the acceleration data? What if you want to enable motion triggered broadcasting? For cases such as these, you have to set the beacon state explicitly (manually) via the Bluetooth Service Characteristic 0x2A80 as described in the iB003N user guide .
We have the new iB004-PLUS SHT Logger beacon in stock. It stores up to 200 temperature and humidity data over a user defined period of 1 to 120 minutes.
As with the non-logging iB004-PLUS, it has a large battery and sends the battery level in the advertising data. The current temperature and humidity can also be extracted from the advertising data without connecting to the beacon.