Wireless sensor networks, the dynamic networks with spatially dispersed sensors are used indispensably in a wide range of applications. Heterogeneous wireless sensor networks represent a collection of sensor nodes of varying capabilities. However, if the energy in the network is not handled effectively, the resource-constrained sensors may reach an early death, affecting the network lifetime. Security and routing are the two vital phenomena in wireless sensor networks that need careful and effective algorithmic execution. The proposed approach is an energy-aware routing algorithm combined with secure data transmission. TDDSRP is an innovative protocol to ensure security while reducing energy consumption. The residual energy and the direct trust value of nodes are crucial parameters to evaluate the energy trust value. The effectiveness of the protocol is tested against the existing counterparts using MATLAB simulations. The experimental results illustrate the performance of the protocol in energy consumption rate, throughput, and security measures.