diff --git a/src/77-mm-usb-device-blacklist.rules b/src/77-mm-usb-device-blacklist.rules
index 8bd126b7c1a72af13e5818e9e8d81e642c91b18c..87f8d5a397a3d4f9483e49c627e67b87a3016744 100644
--- a/src/77-mm-usb-device-blacklist.rules
+++ b/src/77-mm-usb-device-blacklist.rules
@@ -68,9 +68,6 @@ ATTRS{idVendor}=="9e88", ATTRS{idProduct}=="9e8f", ENV{ID_MM_DEVICE_IGNORE}="1"
 # Atmel Corp at91sam SAMBA bootloader
 ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="6124", ENV{ID_MM_DEVICE_IGNORE}="1"
 
-# Dangerous Prototypes Bus Pirate v4
-ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="fb00", ENV{ID_MM_DEVICE_IGNORE}="1"
-
 # All devices from the Swiss Federal Institute of Technology
 ATTRS{idVendor}=="0617", ENV{ID_MM_DEVICE_IGNORE}="1"
 
@@ -198,9 +195,12 @@ ATTRS{idVendor}=="0525", ATTRS{idProduct}=="a4a7", ENV{ID_MM_DEVICE_IGNORE}="1"
 # Silicon Labs Telegesis ETRX USB Zigbee dongle
 ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="000f", ENV{ID_MM_DEVICE_IGNORE}="1"
 
-# All devices from Pycom LTD
-# Since Pycom is not producing any modems, it is safe to blacklist all
-# Pycom LTD devices.
-ATTRS{idVendor}=="04d8", ENV{ID_MM_DEVICE_IGNORE}="1"
+# Devices using Microchip's VID
+# Dangerous Prototypes Bus Pirate v4
+ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="fb00", ENV{ID_MM_DEVICE_IGNORE}="1"
+# Pycom Pysense
+ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="f012", ENV{ID_MM_DEVICE_IGNORE}="1"
+# Pycom Pytrack
+ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="f013", ENV{ID_MM_DEVICE_IGNORE}="1"
 
 LABEL="mm_usb_device_blacklist_end"
diff --git a/src/77-mm-usb-serial-adapters-greylist.rules b/src/77-mm-usb-serial-adapters-greylist.rules
index d11df52d50ab07f9af3837a1ab0aacba6f48aff0..04ca7bae51fdaab8741ec01bf77e99d67be0759b 100644
--- a/src/77-mm-usb-serial-adapters-greylist.rules
+++ b/src/77-mm-usb-serial-adapters-greylist.rules
@@ -13,6 +13,9 @@ ATTRS{idVendor}=="050d", ATTRS{idProduct}=="0103", ENV{ID_MM_DEVICE_MANUAL_SCAN_
 #   on the vendor Id.
 ATTRS{idVendor}=="0403", ENV{ID_MM_DEVICE_MANUAL_SCAN_ONLY}="1"
 
+# Devices using Microchip's VID
+ATTRS{idVendor}=="04d8", ENV{ID_MM_DEVICE_MANUAL_SCAN_ONLY}="1"
+
 # ATEN Intl UC-232A (Prolific)
 ATTRS{idVendor}=="0557", ATTRS{idProduct}=="2008", ENV{ID_MM_DEVICE_MANUAL_SCAN_ONLY}="1"