From 6555442f154b18b1e4ba1330d34bd747ab7bd647 Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sun, 26 Jul 2026 21:32:56 +0200
Subject: [PATCH] commit stale changes

---
 .gitignore |  1 +
 mppt.py    | 17 +++++++++--------
 2 files changed, 10 insertions(+), 8 deletions(-)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9f11b75
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea/
diff --git a/mppt.py b/mppt.py
index 20a74c9..d7902ad 100644
--- a/mppt.py
+++ b/mppt.py
@@ -3,17 +3,18 @@ import random
 from matplotlib import pyplot as plot
 import numpy as np
 
+
 def calc_p(U0, Ri, Rl):
 	I = U0 / (Ri + Rl)
 	Ul = I * Rl
 	P = Ul * I
 
-	return P
+	return P, I, Ul
 
 
 U0 = 10
-Ri = 3.14
-Rl_min = 0.1
+Ri = 5.0
+Rl_min = 0.0
 Rl_max = 10.
 Rl_step_start = 1
 Rl_step_stop = 0.01
@@ -27,11 +28,11 @@ Rl_step = Rl_step_start
 dir = "inc"
 dir_last = dir
 while Rl_step > Rl_step_stop:
-	p0 = calc_p(U0, Ri, Rl_s)
+	p0, _, _ = calc_p(U0, Ri, Rl_s)
 	p1 = p0
 	if "inc" in dir:
 		Rl_s = min(Rl_max, Rl_s + Rl_step)
-		p1 = calc_p(U0, Ri, Rl_s)
+		p1, _, _ = calc_p(U0, Ri, Rl_s)
 		if p0 > p1:
 			if 'inc' in dir_last:
 				Rl_step /= 2
@@ -39,7 +40,7 @@ while Rl_step > Rl_step_stop:
 
 	elif "dec" in dir:
 		Rl_s = max(Rl_min, Rl_s - Rl_step)
-		p1 = calc_p(U0, Ri, Rl_s)
+		p1, _, _ = calc_p(U0, Ri, Rl_s)
 		if p0 > p1:
 			if 'dec' in dir_last:
 				Rl_step /= 2
@@ -50,12 +51,12 @@ while Rl_step > Rl_step_stop:
 
 # --------------------------------------------------
 
-P = calc_p(U0, Ri, Rl)
+P, I, U = calc_p(U0, Ri, Rl)
 plot.plot(Rl, P)
 
 plot.ylabel("Power [W]")
 plot.xlabel("RL [Ohms]")
 plot.title("Power vs RL")
-plot.legend("RL [Ohms]")
+plot.legend(("P_RL",))
 plot.grid()
 plot.show()