From b43b759ecf32cbed4e27435fdf2ce5d47825f9bb Mon Sep 17 00:00:00 2001
From: andig <cpuidle@gmx.de>
Date: Thu, 5 Oct 2023 20:18:15 +0200
Subject: [PATCH] Keba: revert #10036

---
 charger/keba-modbus.go | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/charger/keba-modbus.go b/charger/keba-modbus.go
index d57c02b4e..9bedb5226 100644
--- a/charger/keba-modbus.go
+++ b/charger/keba-modbus.go
@@ -244,14 +244,15 @@ func (wb *Keba) totalEnergy() (float64, error) {
 
 // currents implements the api.PhaseCurrents interface
 func (wb *Keba) currents() (float64, float64, float64, error) {
-	b, err := wb.conn.ReadHoldingRegisters(kebaRegCurrents, 6)
-	if err != nil {
-		return 0, 0, 0, err
-	}
-
 	var res [3]float64
-	for i := 0; i < 3; i++ {
-		res[i] = float64(binary.BigEndian.Uint32(b[4*i:])) / 1e3
+	for i := uint16(0); i < 3; i++ {
+		// does not support reading across register boundaries
+		b, err := wb.conn.ReadHoldingRegisters(kebaRegCurrents+2*i, 2)
+		if err != nil {
+			return 0, 0, 0, err
+		}
+
+		res[i] = float64(binary.BigEndian.Uint32(b)) / 1e3
 	}
 
 	return res[0], res[1], res[2], nil