From b5b031e59341882bd80998e72939a0512d0495d9 Mon Sep 17 00:00:00 2001
From: dooku <mj370@protonmail.com>
Date: Sun, 5 Sep 2021 12:12:00 +0200
Subject: [PATCH] Fixed return in modbus callback

---
 fw/Core/Src/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fw/Core/Src/main.c b/fw/Core/Src/main.c
index 6f8ed44..8aeaecc 100644
--- a/fw/Core/Src/main.c
+++ b/fw/Core/Src/main.c
@@ -123,6 +123,7 @@ int8_t modbus_slave_callback(modbus_transaction_t *transaction)
 		// readout of all measured variables
 		if (transaction->register_number == 30010) { // register number 30010 (randomly selected)
 			transaction->input_registers[0] = CO2;
+			return MODBUS_OK;
 		}
 	}
 	return MODBUS_ERROR_FUNCTION_NOT_IMPLEMENTED; /* nothing implemented yet! TODO */