From b356a66bd123a1378f64ff1cab06e59ad869231b Mon Sep 17 00:00:00 2001
From: uvok
Date: Sun, 3 May 2026 19:53:05 +0200
Subject: Add way to send text

---
 src/ble.cpp | 78 ++++++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 56 insertions(+), 22 deletions(-)

(limited to 'src/ble.cpp')

diff --git a/src/ble.cpp b/src/ble.cpp
index 552055d..6fdc6bc 100644
--- a/src/ble.cpp
+++ b/src/ble.cpp
@@ -5,17 +5,23 @@
 #include "badge/config.h"
 #include "badge/log.h"
 
+#include <string>
+
 using de::uvok::badge::DisplayIndicator;
 
 static NimBLEServer *server;
 static NimBLEAdvertising *pAdvertising;
-static NimBLECharacteristic *selectorCharacteristic;
+static NimBLECharacteristic *selectImageCharacteristic;
+static NimBLECharacteristic *selectTextCharacteristic;
 
-static volatile struct
+template <typename T> struct CharacteristicPoll
 {
-    bool changed;
-    uint8_t value;
-} value_changed;
+    volatile bool changed;
+    T value;
+};
+
+static CharacteristicPoll<uint8_t> select_image_value_changed;
+static CharacteristicPoll<std::string> select_text_changed;
 
 static volatile DisplayIndicator ble_indicator = DisplayIndicator::Uninit;
 
@@ -23,6 +29,7 @@ static volatile DisplayIndicator ble_indicator = DisplayIndicator::Uninit;
 
 const char *templates[] = {
 #include "./images.cfg"
+
 };
 
 class BadgeServerCallbacks : public NimBLEServerCallbacks
@@ -47,7 +54,7 @@ class BadgeSelectorCallbacks : public NimBLECharacteristicCallbacks
     {
         NimBLECharacteristicCallbacks::onWrite(pCharacteristic, connInfo);
 
-        if (pCharacteristic == selectorCharacteristic)
+        if (pCharacteristic == selectImageCharacteristic)
         {
             LOG_F("Write!");
             const char *val = pCharacteristic->getValue().c_str();
@@ -58,21 +65,34 @@ class BadgeSelectorCallbacks : public NimBLECharacteristicCallbacks
             {
                 LOG_F("Error parsing value\n");
                 pCharacteristic->setValue(defVal);
-                (void) pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
+                (void)pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
             }
             else if (newVal >= ARRAY_SIZE(templates))
             {
                 LOG_F("Value out of range: %ld\n", newVal);
                 pCharacteristic->setValue(defVal);
-                (void) pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
+                (void)pCharacteristic->notify(defVal, BLE_HS_CONN_HANDLE_NONE);
             }
             else
             {
                 LOG_F("Value set to %ld\n", newVal);
-                value_changed.value = newVal;
-                value_changed.changed = true;
+                select_image_value_changed.value = newVal;
+                select_image_value_changed.changed = true;
             }
         }
+        else if (pCharacteristic == selectTextCharacteristic)
+        {
+            //
+            auto val = pCharacteristic->getValue().c_str();
+            if (val == nullptr)
+            {
+                return;
+            }
+            std::string newText = val;
+            select_text_changed.value = newText;
+            select_text_changed.changed = true;
+            LOG_F("Received new text: %s\n", newText.c_str());
+        }
     }
 } badgeSelectorCallbacks;
 
@@ -85,11 +105,11 @@ void de::uvok::badge::ble_init()
 
     NimBLEService *service = new NimBLEService("ca260000-b4bb-46b2-bd06-b7b7a61ea990");
     // read/write current
-    selectorCharacteristic =
+    selectImageCharacteristic =
         service->createCharacteristic("ca260001-b4bb-46b2-bd06-b7b7a61ea990",
                                       NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::NOTIFY);
-    selectorCharacteristic->setValue("0");
-    selectorCharacteristic->setCallbacks(&badgeSelectorCallbacks);
+    selectImageCharacteristic->setValue("0");
+    selectImageCharacteristic->setCallbacks(&badgeSelectorCallbacks);
 
     // get pictures
     auto call = service->createCharacteristic("ca260002-b4bb-46b2-bd06-b7b7a61ea990", NIMBLE_PROPERTY::READ);
@@ -102,6 +122,14 @@ void de::uvok::badge::ble_init()
         s.concat(tmp);
     }
     call->setValue(s.c_str());
+
+    // write QR code
+    selectTextCharacteristic =
+        service->createCharacteristic("ca260003-b4bb-46b2-bd06-b7b7a61ea990",
+                                      NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::NOTIFY);
+    selectTextCharacteristic->setValue("");
+    selectTextCharacteristic->setCallbacks(&badgeSelectorCallbacks);
+
     const uint16_t mtuLen = max<uint16_t>(s.length() + 16, 256);
     NimBLEDevice::setMTU(mtuLen);
 
@@ -134,27 +162,33 @@ void de::uvok::badge::ble_advertise()
     }
 }
 
-de::uvok::badge::ble_poll_result_t de::uvok::badge::ble_poll()
+de::uvok::badge::BlePollResult de::uvok::badge::ble_poll()
 {
-    if (value_changed.changed)
+    if (select_image_value_changed.changed)
+    {
+        const uint8_t val = select_image_value_changed.value;
+        select_image_value_changed.changed = false;
+        return BlePollResult::MakeTemplate(val);
+    }
+    if (select_text_changed.changed)
     {
-        const uint8_t val = value_changed.value;
-        value_changed.changed = false;
-        return (ble_poll_result_t){.action_type = BleActionType::Template, .new_template = val};
+        const std::string val = select_text_changed.value;
+        select_text_changed.changed = false;
+        return BlePollResult::MakeText(val);
     }
     if (ble_indicator != DisplayIndicator::Uninit)
     {
         DisplayIndicator ind = ble_indicator;
         ble_indicator = DisplayIndicator::Uninit;
-        return (ble_poll_result_t){.action_type = BleActionType::Indicator, .new_indicator = ind};
+        return BlePollResult::MakeIndicator(ind);
     }
-    return (ble_poll_result_t){.action_type = BleActionType::None};
+    return  BlePollResult::MakeEmpty();
 }
 
 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);
-    (void) selectorCharacteristic->notify(s, BLE_HS_CONN_HANDLE_NONE);
+    selectImageCharacteristic->setValue(s);
+    (void)selectImageCharacteristic->notify(s, BLE_HS_CONN_HANDLE_NONE);
 }
\ No newline at end of file
-- 
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