From 262d69308dc45f9ec133ad9aae532dad81efaa8f Mon Sep 17 00:00:00 2001
From: Martin <25747549+martgras@users.noreply.github.com>
Date: Wed, 22 Sep 2021 19:08:42 +0200
Subject: [PATCH] fix i2c scanning eror for Arduino (#2364)

---
 esphome/components/i2c/i2c_bus_arduino.cpp | 5 ++---
 esphome/components/i2c/i2c_bus_esp_idf.cpp | 4 ++--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/esphome/components/i2c/i2c_bus_arduino.cpp b/esphome/components/i2c/i2c_bus_arduino.cpp
index aba412c3f7..40d8049617 100644
--- a/esphome/components/i2c/i2c_bus_arduino.cpp
+++ b/esphome/components/i2c/i2c_bus_arduino.cpp
@@ -33,9 +33,8 @@ void ArduinoI2CBus::dump_config() {
   if (this->scan_) {
     ESP_LOGI(TAG, "Scanning i2c bus for active devices...");
     uint8_t found = 0;
-    for (uint8_t address = 1; address < 120; address++) {
-      auto err = readv(address, nullptr, 0);
-
+    for (uint8_t address = 8; address < 120; address++) {
+      auto err = writev(address, nullptr, 0);
       if (err == ERROR_OK) {
         ESP_LOGI(TAG, "Found i2c device at address 0x%02X", address);
         found++;
diff --git a/esphome/components/i2c/i2c_bus_esp_idf.cpp b/esphome/components/i2c/i2c_bus_esp_idf.cpp
index 4b93b41877..8bf97b63ec 100644
--- a/esphome/components/i2c/i2c_bus_esp_idf.cpp
+++ b/esphome/components/i2c/i2c_bus_esp_idf.cpp
@@ -43,8 +43,8 @@ void IDFI2CBus::dump_config() {
   if (this->scan_) {
     ESP_LOGI(TAG, "Scanning i2c bus for active devices...");
     uint8_t found = 0;
-    for (uint8_t address = 1; address < 120; address++) {
-      auto err = readv(address, nullptr, 0);
+    for (uint8_t address = 8; address < 120; address++) {
+      auto err = writev(address, nullptr, 0);
 
       if (err == ERROR_OK) {
         ESP_LOGI(TAG, "Found i2c device at address 0x%02X", address);