diff --git a/tools/autobuild/autobuild.sh b/tools/autobuild/autobuild.sh
index 2094601516..b3c9c19c7c 100755
--- a/tools/autobuild/autobuild.sh
+++ b/tools/autobuild/autobuild.sh
@@ -4,8 +4,7 @@
 #
 # Requirements:
 # - All toolchains must be in path (arm-none-eabi-gcc, xtensa-lx106-elf)
-# - IDF_PATH_V42 must be set
-# - IDF_PATH_V44 must be set
+# - IDF_PATH_V50 must be set
 # - MICROPY_AUTOBUILD_MICROPYTHON_REPO must be set to location of micropython repository
 # - MICROPY_AUTOBUILD_MAKE must be set to the make command to use, eg "make -j2"
 #
@@ -13,13 +12,8 @@
 # - MICROPY_AUTOBUILD_REMOTE_MACHINE can be set to a remote ssh machine to copy files to
 # - MICROPY_AUTOBUILD_REMOTE_DIR can be set to destination directory on remote machine
 
-if [ ! -d "$IDF_PATH_V42" ]; then
-    echo "must set IDF_PATH_V42"
-    exit 1
-fi
-
-if [ ! -d "$IDF_PATH_V44" ]; then
-    echo "must set IDF_PATH_V44"
+if [ ! -d "$IDF_PATH_V50" ]; then
+    echo "must set IDF_PATH_V50"
     exit 1
 fi
 
@@ -70,8 +64,7 @@ ${AUTODIR}/build-cc3200-latest.sh ${FW_TAG} ${LOCAL_FIRMWARE}
 cd ../esp8266
 ${AUTODIR}/build-esp8266-latest.sh ${FW_TAG} ${LOCAL_FIRMWARE}
 cd ../esp32
-(source ${IDF_PATH_V42}/export.sh && build_esp32_boards ${FW_TAG} ${LOCAL_FIRMWARE})
-(source ${IDF_PATH_V44}/export.sh && build_esp32_boards ${FW_TAG} ${LOCAL_FIRMWARE})
+(source ${IDF_PATH_V50}/export.sh && build_esp32_boards ${FW_TAG} ${LOCAL_FIRMWARE})
 cd ../mimxrt
 build_mimxrt_boards ${FW_TAG} ${LOCAL_FIRMWARE}
 cd ../nrf
diff --git a/tools/autobuild/build-boards.sh b/tools/autobuild/build-boards.sh
index 0a0e127f2e..aae9981f94 100755
--- a/tools/autobuild/build-boards.sh
+++ b/tools/autobuild/build-boards.sh
@@ -62,36 +62,7 @@ function build_boards {
 }
 
 function build_esp32_boards {
-    # check/get parameters
-    if [ $# != 2 ]; then
-        echo "usage: $0 <fw-tag> <dest-dir>"
-        return 1
-    fi
-
-    fw_tag=$1
-    dest_dir=$2
-
-    # check we are in the correct directory
-    if [ ! -r modesp32.c ]; then
-        echo "must be in esp32 directory"
-        return 1
-    fi
-
-    # build the boards, based on the IDF version
-    for board_json in $(find boards/ -name board.json | sort); do
-        mcu=$(cat $board_json | python3 -c "import json,sys; print(json.load(sys.stdin).get('mcu', 'unknown'))")
-        if idf.py --version | grep -q v4.2; then
-            if [ $mcu = esp32 ]; then
-                # build standard esp32-based boards with IDF v4.2
-                build_board $board_json $fw_tag $dest_dir bin elf map
-            fi
-        else
-            if [ $mcu != esp32 ]; then
-                # build esp32-s2/s3/c3 based boards with IDF v4.4+
-                build_board $board_json $fw_tag $dest_dir bin elf map uf2
-            fi
-        fi
-    done
+    build_boards modesp32.c $1 $2 bin elf map uf2
 }
 
 function build_mimxrt_boards {