diff --git a/tools/mixed_pcb_miniD1_mini32/AhoyDTU/readme.md b/tools/mixed_pcb_miniD1_mini32/AhoyDTU/readme.md
index 8b137891..e84bd808 100644
--- a/tools/mixed_pcb_miniD1_mini32/AhoyDTU/readme.md
+++ b/tools/mixed_pcb_miniD1_mini32/AhoyDTU/readme.md
@@ -1 +1,2 @@
 
+small PCB to mount Wemos mini D1 or Wemos mini32, an OLED an the RF module