Method for synchronizing multiple wireless EMS and TENS devices

1 . A method for synchronizing electrical stimulation devices with a control device, the method comprising, at the control device:

generating synchronization data;

i) scanning for devices available via a wireless communications protocol;

ii) identifying a first electrical stimulation device;

iii) connecting to the first electrical stimulation device; and

repeating steps i) to iii) for a second electrical stimulation device;

providing access to the synchronization data to the first electrical stimulation device, via the wireless communications protocol;

providing access to the synchronization data to the second electrical stimulation device, via the wireless communications protocol;

receiving, from the first electrical stimulation device, a request for a first new connection interval;

receiving, from the second electrical stimulation device, a request for a second new connection interval; and

sending, in response to the requests, new connection intervals to the first and second electrical stimulation devices.

2 . The method according to claim 1 , further comprising, between steps ii) and iii) for each of the first and second electrical stimulation devices, at the control device:

verifying that the first or second electrical stimulation device is a device for providing electrical stimulation to a user.

3 . The method according to claim 1 , further comprising, prior to providing access to the synchronization data, and after step iii), at the control device:

receiving first data from the first electrical stimulation device; and

receiving second data from the second electrical stimulation device.

4 . The method according to claim 3 , wherein the first data comprises at least one first service comprising at least one first characteristic, and wherein the second data comprises at least one second service comprising at least one second characteristic.

5 . The method according to claim 1 , wherein the wireless communications protocol is Bluetooth Low Energy, and wherein the synchronization data comprises a synchronization service and a synchronization characteristic, and wherein the first and second electrical stimulation devices subscribe to the synchronization characteristic.

6 . The method according to claim 5 , wherein when the control device acts as a peripheral device when providing access to the synchronization data, and acts as a central device when receiving the first and second data.

7 . The method according to claim 5 , further comprising, at the control device:

updating the synchronization characteristic, wherein the first and second electrical stimulation devices are notified of the updated synchronization characteristic via subscription thereto.

8 . The method according to claim 7 , wherein updating the synchronization characteristic is initiated in response to receiving a manual input from a user at the control device.

9 . The method according to claim 7 , further comprising, at the control device:

measuring a latency time between the first and second electrical stimulation devices;

comparing the measured latency time to a predetermined threshold; and

updating the synchronization characteristic if the measured latency times exceeds the predetermined threshold.

10 . The method according to claim 9 , further comprising, at the control device:

initiating a stimulation program, wherein measuring a latency time between the first and second electrical stimulation devices comprises:

receiving a time stamp from the first electrical stimulation device;

receiving a time stamp from the second electrical stimulation device; and

calculating the difference in time between the time stamps, wherein the time stamps correspond to the same predetermined point in the stimulation program.

11 . The method according to claim 1 , further comprising:

initiating, by the control device, a stimulation program at the first and second electrical stimulation devices, wherein the stimulation program is implemented by the first and second electrical stimulation devices in a synchronized manner using the synchronization data, optionally wherein there is less than 50 milli seconds difference between execution of the stimulation program at the first and second electrical stimulation devices.

12 . A control device configured to perform the steps of claim 1 .

13 . A method for synchronizing first and second electrical stimulation devices with a control device, the method comprising, at the first and second electrical stimulation devices:

advertising availability for connections via a wireless communications protocol;

accessing synchronization data from a control device via the wireless communications protocol, wherein accessing synchronisation data from the control device comprises:

after identification by the control device, scanning the control device for the synchronization data; and

subscribing to the synchronisation data;

requesting a new connection interval from the control device;

receiving the new connection interval;

determining whether the new connection interval is acceptable; and

completing connection if the new connection interval is acceptable or terminating connection if the new connection interval is not acceptable; and

repeating steps performed by the first electrical stimulation device at the second electrical stimulation device.

14 . The method according to claim 13 , further comprising, at the first electrical stimulation device:

providing access to first data to the control device.

15 . The method according to claim 13 , further comprising, at the first electrical stimulation device:

receiving instructions to implement a stimulation program;

implementing the stimulation program; and

sending a time stamp to the control device at one or more predetermined points during the stimulation program.

16 . The method according to claim 13 , wherein the wireless communications protocol is Bluetooth Low Energy, wherein the synchronization data comprises a synchronization service and a synchronization characteristic, wherein the first data comprises a first service and a first characteristic, and wherein subscription to the synchronization data comprises implementing a notification at the first electrical stimulation device that notifies the first electrical stimulation device when the synchronization characteristic is updated at the control device.

17 . A system comprising a first and a second electrical stimulation device configured to perform the steps of claim 13 .

18 . A system, comprising:

a control device that performs the steps of:

generating synchronization data;

i) scanning for devices available via a wireless communications protocol;

ii) identifying a first electrical stimulation device;

iii) connecting to the first electrical stimulation device;

repeating steps i) to iii) for a second electrical stimulation device

providing access to the synchronization data to the first electrical stimulation device, via the wireless communications protocol;

providing access to the synchronization data to a second electrical stimulation device, via the wireless communications protocol;

receiving, from the first electrical stimulation device, a request for a new connection interval;

receiving, from the second electrical stimulation device, a request for a new connection internal; and

sending, in response to the requests, a new connection internal to the first and second electrical stimulation devices; and

a system according to claim 17 .

19 . A method for synchronizing first and second electrical stimulation devices with a control device using a wireless communications protocol, the method comprising:

in a first stage, operating the control device as a central device and operating first and second electrical stimulation devices as peripheral devices, the first stage comprising:

identifying, by the control device, the first and second electrical stimulation devices;

connecting the control device to each of the first and second electrical stimulation devices; and

transmitting a first and a second service and characteristic from the first and second electrical stimulation devices to the control device; and

in a second stage, operating the control device as a peripheral device and operating the first and second electrical stimulation devices as central devices, the second stage comprising:

identifying, by the first and second electrical stimulation devices, a synchronization characteristic at the control device;

subscribing, at the first and second electrical stimulation devices, to the synchronization characteristic;

and wherein connecting the control device to each of the first and second electrical stimulation devices comprises, at the first and second electrical stimulation devices:

requesting a new connection interval from the control device:

receiving the new connection interval;

determining whether the new connection interval is acceptable; and

completing connection if the new connection interval is acceptable or terminating connection if the new connection interval is not acceptable.

20 . A system, comprising:

a control device;

a first electrical stimulation device; and

a second electrical stimulation device, wherein the system is configured to perform the method steps of claim 19 .