example 'meshtastic': minor update (define device to be used)

examples/meshtastic/app.asd

@@ -1,6 +1,7 @@
 (defsystem :app
   :serial t
   :depends-on (#-depends-loaded :uiop
+               #-depends-loaded :cl-base64
                #-depends-loaded :my-cl-protobufs
                #-depends-loaded :trivial-package-local-nicknames)
   :components ((:file "lisp/package")

examples/meshtastic/cpp/ble.cpp

@@ -27,7 +27,7 @@ void BLE::startDeviceDiscovery() {
 
 void BLE::addDevice(const QBluetoothDeviceInfo& device) {
   if (deviceFilter(device)) {
-    qDebug() << "device added: " << device.name();
+    qDebug() << "device added:" << device.name() << device.address().toString();
   }
 }
 
@@ -108,7 +108,7 @@ void BLE::serviceScanDone() {
 
 void BLE::connectToService(const QString& uuid) {
   QLowEnergyService* service = nullptr;
-  for (auto s: qAsConst(services)) {
+  for (auto s : qAsConst(services)) {
     if (s->serviceUuid().toString() == uuid) {
       service = s;
       break;

examples/meshtastic/cpp/qt.cpp

@@ -12,13 +12,29 @@ QObject* ini() {
   return qt;
 }
 
+static QBluetoothDeviceInfo toDeviceInfo(const QVariantMap& map) {
+  return QBluetoothDeviceInfo(QBluetoothAddress(map.value("address").toString()),
+                              map.value("name").toString(),
+                              0);
+}
+
 QT::QT() : QObject() {
   ble = new BLE_ME;
 }
 
-QVariant QT::startDeviceDiscovery() {
+QVariant QT::setDevice(const QVariant& vMap) {
+  auto map = vMap.value<QVariantMap>();
+  ble->setCurrentDevice(toDeviceInfo(map));
+  return vMap;
+}
+
+QVariant QT::startDeviceDiscovery(const QVariant& vMap) {
+  auto map = vMap.value<QVariantMap>();
+  if (!map.isEmpty()) {
+    ble->currentDevice = toDeviceInfo(map);
+  }
   ble->startDeviceDiscovery();
-  return QVariant();
+  return vMap;
 }
 
 QVariant QT::read2() {

examples/meshtastic/cpp/qt.h

@@ -19,7 +19,8 @@ class QT : public QObject {
 
 public:
   // BLE_ME
-  Q_INVOKABLE QVariant startDeviceDiscovery();
+  Q_INVOKABLE QVariant setDevice(const QVariant&);
+  Q_INVOKABLE QVariant startDeviceDiscovery(const QVariant& = QVariant());
   Q_INVOKABLE QVariant read2();
   Q_INVOKABLE QVariant write2(const QVariant&);
 

examples/meshtastic/lisp/main.lisp

@@ -1,8 +1,14 @@
 (in-package :app)
 
+;; set here the name and address of your 2 devices
+;; (see debug output during device discovery)
+
+(defvar *device-1* '(:name "Meshtastic_128c" :address "F4:12:FA:9D:12:8D"))
+(defvar *device-2* '(:name "Meshtastic_1c9c" :address "F4:12:FA:9D:1C:9D"))
+
 (defun ini ()
   (qt:ini)
-  (qt:start-device-discovery qt:*ble*)
+  (qt:start-device-discovery qt:*ble* *device-1*) ; set device (see above)
   (msg:load-messages)
   (q> |playing| ui:*loading* nil) ; shown during Lisp startup
   (q> |playing| ui:*busy* t))     ; shown during BLE setup

examples/meshtastic/lisp/package.lisp

@@ -7,6 +7,7 @@
   (:local-nicknames (:pr :cl-protobufs)
                     (:me :cl-protobufs.meshtastic))
   (:export
+   #:*channel*
    #:*channels*
    #:*config-lora*
    #:*my-node-info*
@@ -17,13 +18,16 @@
    #:*received*
    #:*region*
    #:*remote-node*
+   #:channel-to-url
    #:start-config
    #:read-radio
    #:received-from-radio
    #:receiving-done
    #:send-message
    #:send-to-radio
-   #:set-ready))
+   #:set-fixed-pin
+   #:set-ready
+   #:url-to-channel))
 
 (defpackage :messages
   (:nicknames :msg)

examples/meshtastic/lisp/qt.lisp

@@ -3,6 +3,7 @@
   (:export
    #:*ble*
    #:ini
+   #:set-device
    #:start-device-discovery
    #:read*
    #:write*))

examples/meshtastic/lisp/radio.lisp

@@ -2,7 +2,7 @@
 
 (defvar *region* :eu-868) ; Europe 868 MHz
 
-(defvar *primary-channel* nil)
+(defvar *my-channel*   nil)
 (defvar *channels*     nil)
 (defvar *my-node-info* nil)
 (defvar *node-infos*   nil)
@@ -109,8 +109,9 @@
   (dolist (struct *received*)
     (cond ((me:from-radio.has-packet struct)
            (let* ((packet (me:from-radio.packet struct))
-                  (decoded (me:decoded packet))
+                  (decoded (me:decoded packet)))
-                  (payload (me:payload decoded)))
+             (when decoded
+               (let ((payload (me:payload decoded)))
                  (case (me:portnum decoded)
                    ;; text-message
                    (:text-message-app
@@ -123,7 +124,7 @@
                     (msg:change-state (case (me:routing.error-reason
                                              (pr:deserialize-from-bytes 'me:routing payload))
                                         (:none :received))
-                                  (me:request-id decoded))))))
+                                      (me:request-id decoded))))))))
           ;; my-info
           ((me:from-radio.has-my-info struct)
            (setf *my-node-info* (me:my-node-num (me:my-info struct))))
@@ -136,9 +137,9 @@
           ;; channel
           ((me:from-radio.has-channel struct)
            (let ((channel (me:channel struct)))
-             (if (eql :primary (me:role channel))
+             (when (eql :primary (me:role channel))
-                 (setf *primary-channel* channel)
+               (setf *my-channel* channel))
-                 (push channel *channels*))))
+             (push channel *channels*)))
           ;; config lora
           ((me:from-radio.has-config struct)
            (let ((config (me:config struct)))
@@ -163,6 +164,10 @@
                        :payload (pr:serialize-to-bytes admin-message)
                        :want-response t)))))
 
+(defun set-channel (channel)
+  (send-admin (me:make-admin-message
+               :set-channel (setf *my-channel* channel))))
+
 (defun config-device ()
   "Absolut minimum necessary for sending text messages."
   ;; lora settings
@@ -175,8 +180,24 @@
                         :hop-limit 3
                         :tx-enabled t))))
   ;; channel settings
-  (send-admin
+  (set-channel (me:make-channel
-   (me:make-admin-message
-    :set-channel (me:make-channel
                 :settings (me:make-channel-settings :psk (to-bytes (list 1)))
-                  :role :primary))))
+                :role :primary)))
+
+(defun channel-to-url (&optional channel)
+  (let ((base64 (base64:usb8-array-to-base64-string
+                 (pr:serialize-to-bytes (or channel *my-channel*)))))
+    ;; remove padding, substitute characters as by definition
+    (x:cc "https:/meshtastic.org/e/#"
+          (string-right-trim "=" (substitute #\- #\+ (substitute #\_ #\/ base64))))))
+
+(defun url-to-channel (url &optional (set t))
+  (let ((base64 (+ 2 (subseq "/#" url))))
+    ;; re-add padding
+    (setf base64 (x:cc base64
+                       (make-string (mod (length base64) 4) :initial-element #\=)))
+    (let ((channel (pr:deserialize-from-bytes
+                    (base64:base64-string-to-usb8-array base64))))
+      (if set
+          (set-channel channel)
+          channel))))

examples/meshtastic/readme.md

@@ -65,6 +65,10 @@ restart the phone.
 On Linux you might need to restart the bluetooth service if you want to pair
 a different device (after already pairing a first one).
 
+To choose which app instance will use which device, set both name and address
+in [main.lisp](lisp/main.lisp), and set one app to `*device-1*` and the other
+to `*device-2*`.
+
 
 
 Run

examples/meshtastic/run.lisp

@@ -8,6 +8,7 @@
       asdf:*central-registry*)
 
 (asdf:load-system :uiop)
+(asdf:load-system :cl-base64)
 (asdf:load-system :trivial-package-local-nicknames)
 
 ;; may take very long on mobile devices