Inside every Bluetooth sensor beacon is a System on a Chip (SoC) that’s a small computer that runs code. Dialog Semiconductor, the manufacturer of the SoC in some beacons, has just announced the world’s smallest (2.0mm x 1.7mm) and most power-efficient Bluetooth 5.1 SoC the DA14531.
The high level of integration means it only needs six additional electronic components and a power supply to make a complete Bluetooth low energy system. It’s expected to bring SoCs down to $0.50 in high volume.
While beacons tend to be limited by battery size rather than SoC size, the reduced price might bring downward pressure on cost. The small size is of more use in power harvesting/wearable scenarios such as printed Bluetooth sensors, connected injectors, glucose monitors and smart patches.
The type of System on a Chip (SoC) can greatly affect beacon battery life. At one time it was only Dialog that had low power SoCs. TI, NXP and Nordic followed and now Toshiba has joined them with their new TC35678FSG, TC35678FXG and TC35679FSG (PDF).
Toshiba has more information on these products.
The BeaconZone store has a special category for low power SoC beacons.
We have the new ASensor beacon in stock. This is our smallest sensor beacon measuring only 37.3mm x 37.3mm x 7mm and it uses the power efficient Dialog DA14580 that gives up to 1.5 years from a CR2025 battery.
The beacon supports iBeacon, Eddystone or sensor advertising. For sensor mode, the temperature, acceleration and battery level are in the advertising data.
We now have a few samples of the new TON9218 solar powered beacon available. The large 6.5cm x 9.6cm solar panel keeps the on-board rechargeable LIR2032 battery charged using only normal indoor lighting. Even with weak light, the solar panel generates about 100uA that’s 5x the average current consumption. Hence, with the use of the rechargeable LIR2032 battery as backup, this beacon can work almost forever.
As with the other Iotton models, the beacon has an internal timer and uses the Dialog DA14580 that provides 2x to 3x battery life of Nordic nrf51822 based beacons and up to x6 the battery life of TI CC254x based-beacons.
We now have a some watch style beacons in stock. They transmit iBeacon and the ‘face’ is small at 2.5cm. Internally, they use a Dialog DA14580 that’s the most power efficient chip for beacon solutions and have x6 the battery life of TI CC254x based-beacons.