Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

RFM95_sendWithRetry. Is this P-persistent CSMA?

cloolalang last edited by
Im just looking for clarification on
RFM95_sendWithRetry
```
const uint32_t enterCSMAMS = hwMillis();
		const uint16_t randDelayCSMA = enterMS % 100;
		while (hwMillis() - enterCSMAMS < randDelayCSMA) {
			doYield();
```
I think these parameters could have an effect on the RF traffic and Time-on-air right?

I would be keep to see the CSMA part explained or if its a particular type:

https://www.tutorialspoint.com/p-persistent-csma-protocol

P
Reply Quote 0
1 Reply Last reply

1
Posts

12
Views

Suggested Topics

Arduino Celebrates 10 years (Malmö/Sweden)
Announcements • • hek

1

0
Votes

1
Posts

3310
Views

No one has replied
Counting Incoming and Outgoing Messages from a Gateway
Development • • Trand

3

1
Votes

3
Posts

25
Views

@mfalkvidd Thank you very much, that's exactly what I was looking for!
Sending offset to node
Development • • bsl88k

3

0
Votes

3
Posts

41
Views

Thanks for the idea, i will look into it soon, will let know how it goes..
LAN8720A - will mysensors work with this module
Development • • Marcin

3

0
Votes

3
Posts

22
Views

Thanks for the answer. I meant that Mysensors has ESP32 support but only in terms of WIFI. It supports e.g. stm32 with ENC or W5500 modules - and the question is whether and how to add ESP32 support with LAN8720 module. I am not considering using ESPHOME or MQTT - I want to have native communication with the controller that implements my control schemes on its side. I try to program KC868-A16 but it does not matter - the question is whether such support can be added in a simple way.
Radio waking up for no reason.
Development • • Sasquatch

3

0
Votes

3
Posts

37
Views

Over 4 years on, and my node ran continuously sending 4 messages every 5 minutes. It's 700mAh LiFePo4 battery voltage dropped from initial 3.45V to 3.24V, according to LiFePo4 voltge/SoC tables It's just under 40% left. 700*60% = 420mAh. 100 mAH per year. using library 2.40 and blob message I could cut usage to ~25mAh/year, not bad
MQTT-Help me understand about the MQTT Gateway.
Development • • dpcons

11

0
Votes

11
Posts

53
Views

@dpcons MQTT sounds intimidating and looks imitimidating when you see all of the options available. Here's the scenario: You want to send a message. That's the -m option followed by a space and the message between " " the location, topic, is a tree, -t option, separated by forward slash / eg. MyRootTopic/MyTopicsSub/MyTopicSubSub It's as easy as that if your broker, the MQTT service (program) is on the same computer as the sending program. Usually it's not. Specifiy the location, the host, of the broker with the -h option followed by the host name or IP address The retain option, -r is important but explaining it is beyone the scope of this message Receiving, subscribing, to a topic is just the same, but you wouldn't have the -m message If you subscribe from the command line, the subscribe function waits indefinitely for messages published to the subscribed topic (unless you use the -C option) ^C to terminate the command. A tamotized device with the MQTT configured will create a number of topics on the broker. Home Assistant will see this automatically, if you have the Tasmota and MQTT Integrations installed. The MySensors MQTT gateway takes care of MQTT communication for a MySensors device. Again the MySensors and MQTT integrations. I use both. -OSD

RFM95_sendWithRetry. Is this P-persistent CSMA?

Suggested Topics

Arduino Celebrates 10 years (Malmö/Sweden)
Announcements • • hek

Counting Incoming and Outgoing Messages from a Gateway
Development • • Trand

Sending offset to node
Development • • bsl88k

LAN8720A - will mysensors work with this module
Development • • Marcin

Radio waking up for no reason.
Development • • Sasquatch

MQTT-Help me understand about the MQTT Gateway.
Development • • dpcons

35
Online

11.5k
Users

11.1k
Topics

112.9k
Posts

RFM95_sendWithRetry. Is this P-persistent CSMA?

Suggested Topics

Arduino Celebrates 10 years (Malmö/Sweden) Announcements • • hek

Counting Incoming and Outgoing Messages from a Gateway Development • • Trand

Sending offset to node Development • • bsl88k

LAN8720A - will mysensors work with this module Development • • Marcin

Radio waking up for no reason. Development • • Sasquatch

MQTT-Help me understand about the MQTT Gateway. Development • • dpcons

35Online

11.5kUsers

11.1kTopics

112.9kPosts

Arduino Celebrates 10 years (Malmö/Sweden)
Announcements • • hek

Counting Incoming and Outgoing Messages from a Gateway
Development • • Trand

Sending offset to node
Development • • bsl88k

LAN8720A - will mysensors work with this module
Development • • Marcin

Radio waking up for no reason.
Development • • Sasquatch

MQTT-Help me understand about the MQTT Gateway.
Development • • dpcons

35
Online

11.5k
Users

11.1k
Topics

112.9k
Posts