@zboblamont Thanks, you are proposing to filter out wrong reading, I am trying to understand why system periodically sends out 0.

zboblamont . Thank you, I understand all of this except I really don't see in sketch testing of two consecutive results in X attempts. I see that node will wake up and update the distance if new data is different than old data, but, anyway, question was about something different. Why, single sensor node based on this example periodically generates 0 distance? Are there different models of these sensors, so NewPing library needs to be altered?

Actually, even when I use this example without any changes with single sensor, quite often node sends out 0cm. Real distance in my office from table top to ceiling is about 160cm. Maximum distance set to 300.

Are there any tricks to configure one node with two distance sensors? I tried, it generally works, shows two distances, but periodically shows first or second distance =0

Looking at code example it seems to be sufficient to set bool metric = false to get readings in Fahrenheit, but node still returns readings in C. Any idea why?

@mfalkvidd

Here is my sketch intended to detect water leak from a sensor connected to D4:

#define MY_DEBUG
#define MY_BAUD_RATE 9600
#define MY_RADIO_RF24
#include <ESP8266WiFi.h>
#include <MySensors.h>
#define LEAK_1_CHILD_ID 1
#define LEAK_1_PIN D4
bool LEAK_1;
bool last_LEAK_1;
MyMessage msg_LEAK_1(LEAK_1_CHILD_ID,V_TRIPPED);

void setup()
{
pinMode(LEAK_1_PIN,INPUT);
digitalWrite(LEAK_1_PIN,HIGH);
WiFi.mode( WIFI_OFF );
WiFi.forceSleepBegin();
}

void presentation()
{
present(LEAK_1_CHILD_ID, S_DOOR);
}

void loop()
{
LEAK_1 =digitalRead(LEAK_1_PIN);
if (LEAK_1 != last_LEAK_1)
{
send(msg_LEAK_1.set(LEAK_1));
last_LEAK_1 = LEAK_1;
}
}

Here is what I am reading over serial interface. After seems to be successful initial communication, ESP gets stack on not getting ACK from the radio. Any idea why?

189 MCO:BGN:INIT NODE,CP=RNNNE---,REL=255,VER=2.3.1
377 TSM:INIT
391 TSF:WUR:MS=0
414 TSM:INIT:TSP OK
435 TSF:SID:OK,ID=102
458 TSM:FPAR
508 TSF:MSG:SEND,102-102-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
1262 TSF:MSG:READ,0-0-102,s=255,c=3,t=8,pt=1,l=1,sg=0:0
1320 TSF:MSG:FPAR OK,ID=0,D=1
2585 TSM:FPAR:OK
2602 TSM:ID
2615 TSM:ID:OK
2631 TSM:UPL
2649 TSF:MSG:SEND,102-102-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1
2724 TSF:MSG:READ,0-0-102,s=255,c=3,t=25,pt=1,l=1,sg=0:1
2784 TSF:MSG:PONG RECV,HP=1
2813 TSM:UPL:OK
2830 TSM:READY:ID=102,PAR=0,DIS=1
2867 TSF:MSG:SEND,102-102-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100
2946 TSF:MSG:READ,0-0-102,s=255,c=3,t=15,pt=6,l=2,sg=0:0100
3013 TSF:MSG:SEND,102-102-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=OK:2.3.1
3094 TSF:MSG:SEND,102-102-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=OK:0
5170 TSF:MSG:SEND,102-102-0-0,s=1,c=0,t=0,pt=0,l=0,sg=0,ft=0,st=OK:
5241 MCO:REG:REQ
5263 TSF:MSG:SEND,102-102-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2
5339 TSF:MSG:READ,0-0-102,s=255,c=3,t=27,pt=1,l=1,sg=0:1
5398 MCO:PIM:NODE REG=1
5424 MCO:BGN:STP
force slp enable,type: 2
fpm open,type:2 0
5443 MCO:BGN:INIT OK,TSP=1
7768 !TSF:MSG:SEND,102-102-0-0,s=1,c=1,t=16,pt=1,l=1,sg=0,ft=0,st=NACK:1

Thank you, I will try

I happen to have few ESP8266 and NRF24+ laying around and would like to use ESP instead of Arduino to blend with the rest of mySensors network. I prefer WiFi disabled on ESP. Does anybody have a sample code to start with?

@mfalkvidd One of the efficient ways to do it (if doable) is to replace site examples with links to main MySensors git repo. I noticed that some examples on site are incorporated into the pages, some are done as links already. I realize thou that examples in git repo could be different. The goal of git repo examples, as I see it, is to show technology capabilities covering majority of typical applications, while on website you may also publish some real exotic examples, such as sky stars, or whole house fan.

Please don't get me wrong, I love MySensors and very pleased with technology, documentation and support. This is just in my nature to attempt to clarify and optimize whatever I can. My colleagues at work hate me for this...