Energy-Efficient IoT-Based Light Control System in Smart Indoor Agriculture

. 2023 Sep 5;23(18):7670. doi: 10.3390/s23187670

Algorithm 1 Distributed LED brightness control algorithm

1:
Initialize $θ_{i} = 0$ for $i = 1, \dots, N$ , $α = 1$ , and desired error tolerance $ϵ$
2:
N: number of clients
3:
Initialize ${\hat{L}}_{t, i}$ according to user requirements, for $i = 1, \dots, N$
4:
#sensor calibration:
5:
For $i = 1, \dots, N$ , send $θ_{i} = 0$ to client i
6:
For $i = 1, \dots, N$ , receive $L_{t, i} = 0$ from client i
7:
For $i = 1, \dots, N$ , send $θ_{i} = 1$ to client i
8:
For $i = 1, \dots, N$ , receive $L_{t, i} = L_{m a x, i}$ from client i
9:
#LED brightness control:
10:
If a value $L_{t, i}$ is received from a client i:
11:
While True:
12:
$θ_{i} : = θ_{i} - α \frac{J^{'} (θ_{i})}{J^{″} (θ_{i})}$
13:
If $J^{'} (θ_{i}) < ϵ$ :
14:
Break
15:
Send $θ_{i}$ to client i
16:
Else
17:
Wait for $L_{t, i}$ from a client i