blocking read is not blocking

simulator/send-random/send-random.ino

@@ -0,0 +1,55 @@
+/*
+ *  simulateur de telemesure automate
+ */
+
+/* -------------------------------------------------- */
+
+#define NBVAL   4
+
+int   values[NBVAL];
+
+/* -------------------------------------------------- */
+void setup() {
+  int   foo;
+  Serial.begin(9600);
+  pinMode(LED_BUILTIN, OUTPUT);
+  for (foo=0; foo<NBVAL; foo++) {
+    values[foo] = 0;
+  }
+}
+/* -------------------------------------------------- */
+void updatevalues(void)
+{
+  int foo;
+  for (foo=0; foo<NBVAL; foo++) {
+    if (rand()%100<33) {
+      values[foo] += (foo + 1);
+      }
+    if (values[foo] > 1023) {
+      values[foo] = rand()%15;
+      }
+  }
+}
+/* -------------------------------------------------- */
+
+void sendvalues(void)
+{
+  int foo;
+
+  Serial.print("X ");
+  for (foo=0; foo<NBVAL; foo++) {
+    Serial.print(" ");
+    Serial.print(values[foo]);
+    }
+  Serial.print("\n");
+}
+/* -------------------------------------------------- */
+
+void loop() {
+  updatevalues();
+  sendvalues();
+  delay(5000);
+}
+
+/* -------------------------------------------------- */
+