From 04e0902ca6c0e817bd88d53a510a03935e3d6fc7 Mon Sep 17 00:00:00 2001
From: me-no-dev <hristo@espressif.com>
Date: Wed, 14 Dec 2016 18:43:32 +0200
Subject: [PATCH] Wire: if we are reading only one byte, do not send empty read
 command

---
 cores/esp32/esp32-hal-i2c.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/cores/esp32/esp32-hal-i2c.c b/cores/esp32/esp32-hal-i2c.c
index d11add60..a6cd5b58 100644
--- a/cores/esp32/esp32-hal-i2c.c
+++ b/cores/esp32/esp32-hal-i2c.c
@@ -267,9 +267,17 @@ i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, bool addr_10bit, uint8_t * data
             i2cResetFiFo(i2c);
         }
 
-        i2cSetCmd(i2c, cmdIdx++, I2C_CMD_READ, willRead, false, false, false);
-        if((len - willRead) > 1) {
-            i2cSetCmd(i2c, cmdIdx++, I2C_CMD_END, 0, false, false, false);
+        if(willRead){
+            i2cSetCmd(i2c, cmdIdx++, I2C_CMD_READ, willRead, false, false, false);
+            if((len - willRead) > 1) {
+                i2cSetCmd(i2c, cmdIdx++, I2C_CMD_END, 0, false, false, false);
+            } else {
+                willRead++;
+                i2cSetCmd(i2c, cmdIdx++, I2C_CMD_READ, 1, true, false, false);
+                if(sendStop) {
+                    i2cSetCmd(i2c, cmdIdx++, I2C_CMD_STOP, 0, false, false, false);
+                }
+            }
         } else {
             willRead++;
             i2cSetCmd(i2c, cmdIdx++, I2C_CMD_READ, 1, true, false, false);