From 7791f43fb1b328e470ed14facc064f4252ce636e Mon Sep 17 00:00:00 2001
From: uvok
Date: Sun, 20 Jul 2025 11:16:11 +0200
Subject: Handle r/w/notify properly

signal back bluetooth selection
---
 src/ble.cpp | 39 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

(limited to 'src/ble.cpp')

diff --git a/src/ble.cpp b/src/ble.cpp
index 1e0b252..7388b80 100644
--- a/src/ble.cpp
+++ b/src/ble.cpp
@@ -9,6 +9,12 @@ static NimBLEServer *server;
 static NimBLEAdvertising *pAdvertising;
 static NimBLECharacteristic *selectorCharacteristic;
 
+static volatile struct
+{
+    bool changed;
+    uint8_t value;
+} value_changed;
+
 #define IMAGE_DATA(_, display) display
 
 const char *templates[] = {
@@ -35,24 +41,28 @@ class BadgeSelectorCallbacks : public NimBLECharacteristicCallbacks
 
         if (pCharacteristic == selectorCharacteristic)
         {
+            LOG_F("Write!");
             const char *val = pCharacteristic->getValue().c_str();
             char *end = NULL;
             long newVal = strtol(val, &end, 10);
+            String defVal("0");
             if (end == NULL || end == val)
             {
                 LOG_F("Error parsing value\n");
-                pCharacteristic->setValue("0");
-                pCharacteristic->notify(BLE_HS_CONN_HANDLE_NONE);
+                pCharacteristic->setValue(defVal);
+                pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
             }
             else if (newVal >= ARRAY_SIZE(templates))
             {
                 LOG_F("Value out of range: %d\n", newVal);
-                pCharacteristic->setValue("0");
-                pCharacteristic->notify(BLE_HS_CONN_HANDLE_NONE);
+                pCharacteristic->setValue(defVal);
+                pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
             }
             else
             {
                 LOG_F("Value set to %d\n", newVal);
+                value_changed.value = newVal;
+                value_changed.changed = true;
             }
         }
     }
@@ -75,7 +85,7 @@ void de::uvok::badge::ble_init(void)
     // get pictures
     auto call = service->createCharacteristic("ca260002-b4bb-46b2-bd06-b7b7a61ea990", NIMBLE_PROPERTY::READ);
 
-    // needs to be on heap
+    // needs to be on heap???
     String *s = new String();
     for (int i = 0; i < ARRAY_SIZE(templates); i++)
     {
@@ -101,3 +111,22 @@ void de::uvok::badge::ble_advertise(void)
         pAdvertising->start(10000);
     }
 }
+
+de::uvok::badge::ble_poll_result_t de::uvok::badge::ble_poll(void)
+{
+    if (value_changed.changed)
+    {
+        const uint8_t val = value_changed.value;
+        value_changed.changed = false;
+        return (ble_poll_result_t){.has_data = true, .new_template = val};
+    }
+    return (ble_poll_result_t){.has_data = false};
+}
+
+void de::uvok::badge::ble_set_image(uint8_t image)
+{
+    LOG_F("Notify BLE: set image to %d\n", image);
+    String s(image);
+    selectorCharacteristic->setValue(s);
+    selectorCharacteristic->notify(s, BLE_HS_CONN_HANDLE_NONE);
+}
\ No newline at end of file
-- 
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