diff --git a/platformio.ini b/platformio.ini
index e5b80bdf..9a7570bb 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -90,11 +90,13 @@ upload_speed = 921600
 
 [platformio]
 ; upload firmware to board with usb cable
-default_envs = usb
+;default_envs = usb
 
 ; upload firmware to a jfrog bintray repository
 ;default_envs = ota
 
+default_envs = dev
+build_cache_dir = /tmp/platformio-shared-cache
 description = Paxcounter is a proof-of-concept ESP32 device for metering passenger flows in realtime. It counts how many mobile devices are around.
 
 [common]
@@ -108,7 +110,6 @@ otakeyfile = ota.conf
 lorakeyfile = loraconf.h
 lmicconfigfile = lmic_config.h
 platform_espressif32 = espressif32@1.9.0
-;platform_espressif32 = https://github.com/platformio/platform-espressif32.git#develop
 board_build.partitions = min_spiffs.csv
 monitor_speed = 115200
 lib_deps_lora =
@@ -169,3 +170,10 @@ upload_protocol = custom
 
 [env:usb]
 upload_protocol = esptool
+
+[env:dev]
+upload_protocol = esptool
+platform = https://github.com/platformio/platform-espressif32.git#develop
+platform_packages =
+  ; use upstream Git version
+  framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git