 
             validateAck(sendData(&packetData, sizeof(packetData)));
             break;
+        }
         default:
             Serial.print(F("Received unknown signal "));
             Serial.println((int)recvByte);

            radio.read(&recvByte, 1);
            radio.writeAckPayload(1, &ackVal, 1);

            Serial.print(F("Received ack"));
        }
    }
    else {

    // NOTE: Always send spaces after text to clear cells past desired content.

    display.setCursor(0, 0);
    String healthStr = isCommHealthy ? "HEALTHY  " : "UNHEALTHY";
    display.print("Comms: " + healthStr);
    display.setCursor(0, 1);

    if (millis() - lastTriggerSignalTime < DISPLAY_TIME_MILLIS) {
