Fig 1.
Architecture inside the capsule.
Fig 2.
PCB LEDs and LED driver.
Fig 3.
Circuit configuration of nRF24L01 at 2.4GHz.
Fig 4.
Flow diagram of the system operation.
Fig 5.
①RF Antenna, ②pH Sensor, ③RF Circuit, ④Micro-controller, ⑤Power Management, ⑥Battery, ⑦LED Driver, ⑧Blue LEDs, ⑨Shell.
Fig 6.
The relationship between the average voltage and pH value measured for the eight testing vessels.
This line is used to convert voltage measured by the antimony electrode of the capsule into pH reading.
Fig 7.
Current efficiency of the therapy unit.
Fig 8.
Efficiency of the therapy unit as a function of time for different power modes.