Software Update
- Added serialization of the S132 SoftDevice v3.0.0. Serialization of S130 is now deprecated.
- Included the latest MDK v8.9.0 with a crucial workaround for nRF52832 Errata 108.
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Nordic has released the nRF5x MDK v8.9.0 in 20 Sep., 2016
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Raytac Corporation
Raytac Corporation
Raytac Corporation
Bluetooth 4.2 introduces industry-leading privacy settings that lowers power consumption and builds upon the government-grade security features of the Bluetooth specification. The new privacy features put control back into the hands of the consumer by making it difficult for eavesdroppers to track a device through its Bluetooth connection without permission. For example, when shopping in a retail store with beacons, unless you’ve enabled permission for the beacon to engage with your device, you can’t be tracked.
Bluetooth 4.2 increases the speed and reliability of data transfers between Bluetooth Smart devices. By increasing the capacity of Bluetooth Smart packets, devices transfer data up to 2.5 times faster than with previous versions. Increased data transfer speeds and packet capacity reduces the opportunity for transmission errors to occur and reduces battery consumption, resulting in a more efficient connection.
Building on the capabilities released earlier with Bluetooth 4.1 and the new features released in 4.2, the Internet Protocol Support Profile (IPSP) will allow Bluetooth Smart sensors to access the Internet directly via IPv6/6LoWPAN. IP connectivity makes it possible to use existing IP infrastructure to manage Bluetooth Smart “edge” devices. This is ideal for connected home scenarios that need both personal and wide area control. This profile will be ratified by the end of the year.
Raytac Corporation
A BT4.1 & BT4.2 module maker based on Nordic nRF51 & nRF52 solution
(nRF51822 & nRF51422 & nRF52832 & nRF51802)
Tel: +886.2.3234.0208
email: service@raytac.com
What is dBM?
From Spec sheet, we can find the output power always stated as dBM.
For example:
Nordic nRF52832
Transmitting power (+4dBM~-20dBM) / Receiving Sensitivity (-96dBM)
dBm is the unit for radiowave, it is a way to express the comparison between the reference signal value
The reference value is 0dBM at 1mW, the unit represented as shown below
1/10000 times = -40 dBm
1/1000 times = -30 dBm
1/100 times = -20 dBm
1/10 times = -10 dBm
1mW = 0 dbm ← Reference Signal Value
10 times = 10 dBm
100 times = 20 dBm
1000 times = 30 dBm
Raytac Corporation
A BT4.1 & BT4.2 module maker based on Nordic nRF51 & nRF52 solution
(nRF51822 & nRF51422 & nRF52832 & nRF51802)
Tel: +886.2.3234.0208
email: service@raytac.com
http://raytaccorp.blogspot.tw/2016/07/ibeacon-vs-eddystone.html
What is Eddystone
Eddystone is the standard for the beacon using the BLE that Google announced in July 2015.
It is available includes a number of broadcast frame types on all platforms that use the BLE, such as iOS as well as Android open standards, designed to give developers and venue owners flexibility in their beacon developments and applications. Eddystone helps beacons using the Proximity Beacon API, including adding attachments in the cloud and monitoring their health.
Feature
Eddystone’s biggest feature is not intended to become a black box such like iBeacon service, works only for iOS. Eddystone program code is designed to be an open standard and has been published in GitHub.
The difference between iBeacon and Eddystone is the “broadcast frame type"
iBeacon transmits ID only (1 Type)
Eddystone transmits not only ID, but also URL and TLM. (3 Types)
Unlike iBeacon, Eddystone provides target users to receive the message through URL without app installing as long as the Bluetooth is turned on.
Packet
Eddystone is allowed to transmit 17 bytes every packet.
Thus, in case of URL broadcast frame type, the data must be downsize to fit in this 17 bytes limitation
User Scence Example
Eddystone is designed to compensate the demerit of iBeacon’s, which is standardization.
However, iBeacon so far is still the most well-known and widely applied service right now as well as iPhone is the most well selling single mobile phone all over the word.
Thus, the trend of which one will prevail the competition between Eddystone Vs. iBeacon is still a interesting topic and lead the delimma for developers and user to observe closely.