diff --git a/libraries/MySensors/core/MySigning.cpp b/libraries/MySensors/core/MySigning.cpp
index 09de114..ef2d207 100644
--- a/libraries/MySensors/core/MySigning.cpp
+++ b/libraries/MySensors/core/MySigning.cpp
@@ -129,8 +129,8 @@ void signerInit(void) {
#endif
}
-void signerPresentation(MyMessage &msg) {
- prepareSigningPresentation(msg, GATEWAY_ADDRESS);
+void signerPresentation(MyMessage &msg, uint8_t destination) {
+ prepareSigningPresentation(msg, destination);
#if defined(MY_SIGNING_REQUEST_SIGNATURES)
msg.data[1] |= SIGNING_PRESENTATION_REQUIRE_SIGNATURES;
@@ -145,8 +145,10 @@ void signerPresentation(MyMessage &msg) {
#if defined(MY_SIGNING_FEATURE)
// If we do support signing, wait for the gateway to tell us how it prefer us to transmit our messages
- SIGN_DEBUG(PSTR("Waiting for GW to send signing preferences...\n"));
- wait(2000);
+ if (destination == GATEWAY_ADDRESS) {
+ SIGN_DEBUG(PSTR("Waiting for GW to send signing preferences...\n"));
+ wait(2000);
+ }
#endif
}
diff --git a/libraries/MySensors/core/MySigning.h b/libraries/MySensors/core/MySigning.h
index 8677151..21eea0b 100644
--- a/libraries/MySensors/core/MySigning.h
+++ b/libraries/MySensors/core/MySigning.h
@@ -157,6 +157,8 @@
* Just set the flag @ref MY_SIGNING_REQUEST_SIGNATURES and the node will inform the gateway that it expects the gateway to sign all
* messages sent to the node. If this is set in a gateway, it will @b NOT force all nodes to sign messages to it. It will only require
* signatures from nodes that in turn require signatures.
+ * If you want to have two nodes communicate securely directly with each other, the nodes that require signatures must send a presentation
+ * message to all nodes it expect signed messages from (only the gateway is informed automatically). See @ref signerPresentation().
* A node can have three "states" with respect to signing:
* 1. Node does not support signing in any way (neither @ref MY_SIGNING_ATSHA204 nor @ref MY_SIGNING_SOFT is set)
* 2. Node does support signing but don't require messages sent to it to be signed (@ref MY_SIGNING_REQUEST_SIGNATURES is not set)
@@ -506,14 +508,19 @@ void signerInit(void);
/**
* @brief Does signing specific presentation for a node.
*
- * This function makes sure any signing related presentation info is shared with the gateway.
+ * This function makes sure any signing related presentation info is shared with the other part.
* The presentation of the gateways signing preferences is done in @ref signerProcessInternal().
* \n@b Usage: This function should be called by the presentation routine of the mysensors library.
- * There is no need to call this directly from a sketch.
+ * You only need to call this directly from a sketch to set up a node to node signed message exchange.
+ * If you do call this directly from a sketch, and you at some point change your sketch to go from
+ * requireing signing to not requireing signatures, you need to present this change to the node at least
+ * once, so it can update its requirements tables accordingly. Or it will keep believing that this node
+ * require signatures and attempt to send signed messages to it.
*
* @param msg Message buffer to use.
+ * @param destination Node ID of the destination.
*/
-void signerPresentation(MyMessage &msg);
+void signerPresentation(MyMessage &msg, uint8_t destination);
/**
* @brief Manages internal signing message handshaking.
diff --git a/libraries/MySensors/core/MyTransport.cpp b/libraries/MySensors/core/MyTransport.cpp
index 70553e5..96b3428 100644
--- a/libraries/MySensors/core/MyTransport.cpp
+++ b/libraries/MySensors/core/MyTransport.cpp
@@ -463,8 +463,8 @@ void transportPresentNode() {
#endif
else
if (_nc.nodeId != AUTO) {
- // Send signing preferences for this node
- signerPresentation(_msg);
+ // Send signing preferences for this node to the GW
+ signerPresentation(_msg, GATEWAY_ADDRESS);
// Send presentation for this radio node
#ifdef MY_REPEATER_FEATURE