diff --git a/.build.yml b/.build.yml
index c056f19..4848ab2 100644
--- a/.build.yml
+++ b/.build.yml
@@ -25,7 +25,6 @@ steps:
   commands:
   - apt update
   - apt install -y make zip
-  - make pcb -j$(nproc)
 #  - make pcb -j$(nproc) BOARD=fiatlux
 #  - make pcb -j$(nproc) BOARD=fiatlux_cc48
 
diff --git a/firmware/web.cpp b/firmware/web.cpp
index 72b13f0..1532f3c 100644
--- a/firmware/web.cpp
+++ b/firmware/web.cpp
@@ -33,6 +33,8 @@ int version = 23;
 
 #define vTaskDelayMs(ms) vTaskDelay((ms) / portTICK_PERIOD_MS)
 
+const char hex_lookup[] = "0123456789ABCDEF\0\0";
+
 uint16_t voltage_val;
 
 struct {
@@ -253,6 +255,8 @@ void websocket_task(void *pvParameter) {
     vTaskDelete(nullptr);
 }
 
+char str[] = "L00000000\n";
+
 /**
  * This function is called when websocket frame is received.
  *