coolchip / node-enocean-esp2 Goto Github PK

Hi,

I used your node red enocean esp2 package for over a year now. I had to modify it to get a good verification of all valid received data from my Eltako FGW14-USB gateway.

Regards

Lars

This is the diff:
diff --git a/parser.js b/parser.js
index d0db21b..380e935 100644
--- a/parser.js
+++ b/parser.js
@@ -83,11 +83,12 @@ const hexStringToByteArray = function (hex) {
return bytes;
};

-const verifyChecksum = function (buf, checksum) {
+const verifyChecksum = function (buf, checksum, hseq) {
let result = 0;
for (let index = 0; index < buf.length; index++) {

•    result = (result + buf[index]) % 0xff;
  

•    result = (result + buf[index]);
  

  }
• result = result & 0xff;
  return result === checksum;
  };

@@ -100,7 +101,7 @@ const sliceBuffer = function (buf) {
telegram.org = buf.readUInt8(3);
telegram.payload = buf.slice(4, 4 + telegram.length - 2);
telegram.checksum = buf.readUInt8(4 + telegram.length - 2);

• telegram.valid = verifyChecksum(buf.slice(2, 4 + telegram.length - 2), telegram.checksum);

• telegram.valid = verifyChecksum(buf.slice(2, 4 + telegram.length - 2), telegram.checksum, telegram.hseq);
  telegram.dataBytes = telegram.payload.slice(0, 4).toString('hex');
  telegram.idBytes = telegram.payload.slice(4, 8).toString('hex');
  telegram.status = telegram.payload.readUInt8(8);
  @@ -233,4 +234,4 @@ const parse = function (buf) {
  return parsed;
  };

I really want to use this nodes in nodered. I've been able to hook up the incoming node and am seeing telegram messages from the Eltako enocean bus, but want to know how to use the output node. How to send telegram messages (format in nodered), more concrete: how do I control actuators (f.e. fud14 dimmer) from nodered? How to receive feedback from the actuators?

If you could share an example nodered flow with a demonstration of the capabilities that would be great.

Thanks in advance!

Ps. I could not find any documentation. If there is any, a link to it will help me also.